International Business Machines Corp
InternatioActive Patents
1
Total Holdings
1450
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| FR1542889A | Foldable chamber pump | Active / In Force | — | — | 0 | Details |
| EP0595291A1 | Improved remote center-of-motion robot for surgery | Expired / Lapsed | 1993-10-27 | — | 29 | Details |
| EP0456103A2 | Image-directed robotic system for precise surgery | Expired / Lapsed | 1991-05-02 | — | 34 | Details |
| EP0447020A1 | Integrated package having a thermoelectric cooler | Expired / Lapsed | 1991-01-18 | — | 17 | Details |
| EP0282702A2 | Bifet logic circuit | Expired / Lapsed | 1988-01-26 | — | 16 | Details |
| EP0205965A2 | Peripheral subsystem having read/write cache with record ac… | Expired / Lapsed | 1986-05-27 | — | 24 | Details |
| EP0073303A1 | Process for forming a patterned mask using a positive elect… | Expired / Lapsed | 1982-06-08 | — | 4 | Details |
| EP0051158A1 | Electrically alterable double dense memory | Expired / Lapsed | 1981-10-05 | — | 14 | Details |
| EP0012910A1 | Thin film magnetic heads | Expired / Lapsed | 1979-12-10 | — | 6 | Details |
| EP0012912A1 | Thin film magnetic transducers | Expired / Lapsed | 1979-12-10 | — | 7 | Details |
| GB1469486A | Testing semiconductor devices | Expired / Lapsed | 1974-05-01 | — | 0 | Details |
| GB1437883A | Ticketing system | Expired / Lapsed | 1974-04-17 | — | 0 | Details |
| GB1433624A | Multi-level interconnection system | Expired / Lapsed | 1973-09-21 | — | 0 | Details |
| DE2344494A1 | VOICE OUTPUT | Expired / Lapsed | 1973-09-04 | — | 0 | Details |
| GB1354827A | Data processing systems | Expired / Lapsed | 1972-05-24 | — | 0 | Details |
| GB1007919A | Character reading apparatus | Expired / Lapsed | 1964-08-11 | — | 0 | Details |
| GB769384A | Transformer matrix system | Expired / Lapsed | 1955-05-17 | — | 0 | Details |
| GB632168A | Improvements in or relating to electrical circuits and elec… | Expired / Lapsed | 1946-09-23 | — | 0 | Details |
| US6115616A | Hand held telephone set with separable keyboard | Expired / Lapsed | 1998-05-28 | 2000-09-05 | 12 | Details |
| US6038181A | Efficient semiconductor burn-in circuit and method of opera… | Expired / Lapsed | 1998-08-18 | 2000-03-14 | 13 | Details |
| US5872797A | Burn-in signal pattern generator | Expired / Lapsed | 1996-12-02 | 1999-02-16 | 21 | Details |
| US5749362A | Method of creating an image of an anatomical feature where … | Expired / Lapsed | 1995-01-26 | 1998-05-12 | 4 | Details |
| US5745422A | Cross-coupled bitline segments for generalized data propaga… | Expired / Lapsed | 1996-11-12 | 1998-04-28 | 33 | Details |
| US5630431A | System and method for augmentation of surgery | Expired / Lapsed | 1994-10-11 | 1997-05-20 | 7 | Details |
| US5479415A | Method and apparatus for generating test pulses | Expired / Lapsed | 1994-03-10 | 1995-12-26 | 17 | Details |
| US5445166A | System for advising a surgeon | Expired / Lapsed | 1994-04-06 | 1995-08-29 | 16 | Details |
| US5417210A | System and method for augmentation of endoscopic surgery | Expired / Lapsed | 1992-05-27 | 1995-05-23 | 20 | Details |
| US5402801A | System and method for augmentation of surgery | Expired / Lapsed | 1994-04-28 | 1995-04-04 | 14 | Details |
| US5317728A | Storage management of a first file system using a second fi… | Expired / Lapsed | 1990-09-07 | 1994-05-31 | 8 | Details |
| US5285453A | Test pattern generator for testing embedded arrays | Expired / Lapsed | 1990-12-28 | 1994-02-08 | 8 | Details |
| US5246884A | Cvd diamond or diamond-like carbon for chemical-mechanical … | Expired / Lapsed | 1991-10-30 | 1993-09-21 | 26 | Details |
| US5225888A | Plasma constituent analysis by interferometric techniques | Expired / Lapsed | 1990-12-26 | 1993-07-06 | 11 | Details |
| US5210485A | Probe for wafer burn-in test system | Expired / Lapsed | 1991-07-26 | 1993-05-11 | 27 | Details |
| US5202971A | System for file and record locking between nodes in a distr… | Expired / Lapsed | 1990-12-17 | 1993-04-13 | 30 | Details |
| US5198995A | Trench-capacitor-one-transistor storage cell and array for … | Expired / Lapsed | 1990-10-30 | 1993-03-30 | 9 | Details |
| US5018060A | Allocating data storage space of peripheral data storage de… | Expired / Lapsed | 1989-01-26 | 1991-05-21 | 13 | Details |
| US4969259A | Pin with tubular elliptical compliant portion and method fo… | Expired / Lapsed | 1988-12-14 | 1990-11-13 | 15 | Details |
| US4587163B1 | US4587163B1 - - Google Patents | Expired / Lapsed | 1984-11-01 | 1990-04-03 | 0 | Details |
| US4910574A | Porous circuit macro for semiconductor integrated circuits | Expired / Lapsed | 1989-02-23 | 1990-03-20 | 23 | Details |
| US4807195A | Apparatus and method for providing a dual sense amplifier w… | Expired / Lapsed | 1987-05-18 | 1989-02-21 | 29 | Details |
| US4791631A | Wide tolerance, modulated blue laser source | Expired / Lapsed | 1987-08-31 | 1988-12-13 | 45 | Details |
| US4771375A | Managing data storage devices connected to a digital comput… | Expired / Lapsed | 1986-09-15 | 1988-09-13 | 11 | Details |
| US4729533A | Support apparatus | Expired / Lapsed | 1987-03-27 | 1988-03-08 | 48 | Details |
| US4714992A | Communication for version management in a distributed infor… | Expired / Lapsed | 1985-11-26 | 1987-12-22 | 13 | Details |
| US4694433A | Semiconductor memory having subarrays and partial word lines | Expired / Lapsed | 1985-04-04 | 1987-09-15 | 7 | Details |
| US4688063A | Dynamic ram cell with MOS trench capacitor in CMOS | Expired / Lapsed | 1986-10-21 | 1987-08-18 | 53 | Details |
| US4644237A | Collision avoidance system | Expired / Lapsed | 1985-10-17 | 1987-02-17 | 19 | Details |
| US4644432A | Three pole single element magnetic read/write head | Expired / Lapsed | 1985-01-28 | 1987-02-17 | 11 | Details |
| US4639919A | Distributed pattern generator | Expired / Lapsed | 1983-12-19 | 1987-01-27 | 25 | Details |
| US4630267A | Programmable timing and synchronization circuit for a TDMA … | Expired / Lapsed | 1984-12-10 | 1986-12-16 | 16 | Details |
| US4587163A | Preparation of ultra high molecular weight polyethylene mor… | Expired / Lapsed | 1984-11-01 | 1986-05-06 | 31 | Details |
| US4577508A | Optical vibration analyzer | Expired / Lapsed | 1984-10-24 | 1986-03-25 | 10 | Details |
| US4554593A | Universal thresholder/discriminator | Expired / Lapsed | 1982-08-18 | 1985-11-19 | 35 | Details |
| US4528659A | Interleaved digital data and voice communications system ap… | Expired / Lapsed | 1981-12-17 | 1985-07-09 | 14 | Details |
| US4495559A | Optimization of an organization of many discrete elements | Expired / Lapsed | 1981-11-02 | 1985-01-22 | 8 | Details |
| US4484292A | High speed machine for the physical design of very large sc… | Expired / Lapsed | 1981-06-12 | 1984-11-20 | 10 | Details |
| US4476524A | Page storage control methods and means | Expired / Lapsed | 1981-07-02 | 1984-10-09 | 28 | Details |
| US4462040A | Single electrode U-MOSFET random access memory | Expired / Lapsed | 1980-03-30 | 1984-07-24 | 5 | Details |
| US4458345A | Process for optical information storage | Expired / Lapsed | 1982-03-31 | 1984-07-03 | 6 | Details |
| US4456995A | Apparatus for high speed fault mapping of large memories | Expired / Lapsed | 1981-12-17 | 1984-06-26 | 20 | Details |
| US4445174A | Multiprocessing system including a shared cache | Expired / Lapsed | 1981-03-31 | 1984-04-24 | 29 | Details |
| US4442487A | Three level memory hierarchy using write and share flags | Expired / Lapsed | 1981-12-31 | 1984-04-10 | 15 | Details |
| US4441785A | Rotary fiber optic switch | Expired / Lapsed | 1981-10-29 | 1984-04-10 | 5 | Details |
| US4434478A | Programming floating gate devices | Expired / Lapsed | 1981-11-27 | 1984-02-28 | 26 | Details |
| US4414059A | Far UV patterning of resist materials | Expired / Lapsed | 1982-12-09 | 1983-11-08 | 20 | Details |
| US4404609A | Thin film inductive transducer for perpendicular recording | Expired / Lapsed | 1981-10-30 | 1983-09-13 | 11 | Details |
| US4400770A | Cache synonym detection and handling means | Expired / Lapsed | 1980-11-10 | 1983-08-23 | 17 | Details |
| US4397018A | Baton passing method and apparatus for maintaining synchron… | Expired / Lapsed | 1980-12-22 | 1983-08-02 | 23 | Details |
| US4389614A | Method and apparatus for generating pulses of a predetermin… | Expired / Lapsed | 1981-05-18 | 1983-06-21 | 22 | Details |
| US4373778A | Connector implemented with fiber optic means and site there… | Expired / Lapsed | 1980-12-30 | 1983-02-15 | 24 | Details |
| US4371932A | I/O Controller for transferring data between a host process… | Expired / Lapsed | 1981-11-25 | 1983-02-01 | 14 | Details |
| US4365779A | Tilt and rotate apparatus for a display monitor | Expired / Lapsed | 1980-06-16 | 1982-12-28 | 8 | Details |
| US4355355A | Address generating mechanism for multiple virtual spaces | Expired / Lapsed | 1980-03-19 | 1982-10-19 | 29 | Details |
| US4345314A | Dynamic threshold device | Expired / Lapsed | 1980-11-19 | 1982-08-17 | 7 | Details |
| US4336603A | Three terminal electrically erasable programmable read only… | Expired / Lapsed | 1980-06-18 | 1982-06-22 | 28 | Details |
| US4335426A | Remote processor initialization in a multi-station peer-to-… | Expired / Lapsed | 1980-03-10 | 1982-06-15 | 7 | Details |
| US4334292A | Low voltage electrically erasable programmable read only me… | Expired / Lapsed | 1980-05-27 | 1982-06-08 | 34 | Details |
| US4322845A | Demand assignment technique for TDMA satellite communicatio… | Expired / Lapsed | 1979-09-28 | 1982-03-30 | 11 | Details |
| US4317168A | Cache organization enabling concurrent line castout and lin… | Expired / Lapsed | 1979-11-23 | 1982-02-23 | 43 | Details |
| US4314244A | Multiple height proportioned character generation | Expired / Lapsed | 1980-06-16 | 1982-02-02 | 12 | Details |
| US4313161A | Shared storage for multiple processor systems | Expired / Lapsed | 1979-11-13 | 1982-01-26 | 15 | Details |
| US4292623A | Port logic for a communication bus system | Expired / Lapsed | 1979-06-29 | 1981-09-29 | 24 | Details |
| US4282540A | FET Containing stacked gates | Expired / Lapsed | 1979-10-19 | 1981-08-04 | 20 | Details |
| US4278493A | Method for cleaning surfaces by ion milling | Expired / Lapsed | 1980-04-28 | 1981-07-14 | 6 | Details |
| US4279023A | Sense latch | Expired / Lapsed | 1979-12-19 | 1981-07-14 | 22 | Details |
| US4260210A | Pluggable module actuation and retention device | Expired / Lapsed | 1979-06-29 | 1981-04-07 | 5 | Details |
| US4255772A | Read/write magnetic head assembly with magnetoresistive sen… | Expired / Lapsed | 1979-06-29 | 1981-03-10 | 13 | Details |
| US4251837A | Three decision thresholding mode switch and method for mode… | Expired / Lapsed | 1979-10-16 | 1981-02-17 | 29 | Details |
| US4250009A | Energetic particle beam deposition system | Expired / Lapsed | 1979-05-18 | 1981-02-10 | 18 | Details |
| US4249193A | LSI Semiconductor device and fabrication thereof | Expired / Lapsed | 1978-05-25 | 1981-02-03 | 32 | Details |
| US4238853A | Cryptographic communication security for single domain netw… | Expired / Lapsed | 1977-12-05 | 1980-12-09 | 80 | Details |
| US4219855A | Thin film magnetic head | Expired / Lapsed | 1978-12-21 | 1980-08-26 | 11 | Details |
| US4186438A | Interactive enquiry system | Expired / Lapsed | 1977-03-16 | 1980-01-29 | 13 | Details |
| US4175275A | R/W Arm that prevents catastrophic failure | Expired / Lapsed | 1978-05-22 | 1979-11-20 | 5 | Details |
| US4165490A | Clock pulse generator with selective pulse delay and pulse … | Expired / Lapsed | 1977-12-19 | 1979-08-21 | 14 | Details |
| US4164668A | Method of correcting the voltage coefficient of resistors i… | Expired / Lapsed | 1977-05-12 | 1979-08-14 | 8 | Details |
| US4159518A | Auto-selection priority circuits for plural channel adapters | Expired / Lapsed | 1977-07-05 | 1979-06-26 | 8 | Details |
| US4155117A | Synchronizing channel-to-channel adapter | Expired / Lapsed | 1977-07-28 | 1979-05-15 | 14 | Details |
| US4150400A | Methods of a coarse-scan/fine-print character reproduction … | Expired / Lapsed | 1977-03-31 | 1979-04-17 | 19 | Details |
| US4149184A | Multi-color video display systems using more than one signa… | Expired / Lapsed | 1977-12-02 | 1979-04-10 | 20 | Details |
| US4144563A | Microprocessor system | Expired / Lapsed | 1977-11-21 | 1979-03-13 | 12 | Details |
| US4142234A | Bias filter memory for filtering out unnecessary interrogat… | Expired / Lapsed | 1977-11-28 | 1979-02-27 | 23 | Details |
| US4135998A | Method for forming pt-si schottky barrier contact | Expired / Lapsed | 1978-04-26 | 1979-01-23 | 9 | Details |
| US4136386A | Backing store access coordination in a multi-processor syst… | Expired / Lapsed | 1977-10-06 | 1979-01-23 | 15 | Details |
| US4136385A | Synonym control means for multiple virtual storage systems | Expired / Lapsed | 1977-03-24 | 1979-01-23 | 14 | Details |
| US4132614A | Etching by sputtering from an intermetallic target to form … | Expired / Lapsed | 1977-10-26 | 1979-01-02 | 34 | Details |
| US4129853A | Method and apparatus for producing compensated signals for … | Expired / Lapsed | 1977-09-26 | 1978-12-12 | 25 | Details |
| US4125873A | Display compressed image refresh system | Expired / Lapsed | 1977-06-29 | 1978-11-14 | 26 | Details |
| US4124870A | Method for improving print quality of coarse-scan/fine-prin… | Expired / Lapsed | 1977-03-31 | 1978-11-07 | 13 | Details |
| USD250022S | Keyboard enclosure for data processing equipment | Expired / Lapsed | 1977-04-07 | 1978-10-24 | 1 | Details |
| US4113614A | Automated hemodialysis treatment systems | Expired / Lapsed | 1976-12-10 | 1978-09-12 | 32 | Details |
| US4100597A | Computer controlled distribution apparatus for distributing… | Expired / Lapsed | 1976-04-02 | 1978-07-11 | 8 | Details |
| US4097802A | Magnetoresistive field sensor with a magnetic shield which … | Expired / Lapsed | 1975-06-30 | 1978-06-27 | 24 | Details |
| US4096355A | Common channel access method for a plurality of data statio… | Expired / Lapsed | 1977-10-13 | 1978-06-20 | 10 | Details |
| US4092061A | Side-coupling of light for an optical fiber | Expired / Lapsed | 1976-12-29 | 1978-05-30 | 5 | Details |
| US4088833A | Carrier detector | Expired / Lapsed | 1976-11-10 | 1978-05-09 | 12 | Details |
| US4088991A | Visual display by electric control of scattering of light f… | Expired / Lapsed | 1976-06-30 | 1978-05-09 | 21 | Details |
| US4078254A | Hierarchical memory with dedicated high speed buffers | Expired / Lapsed | 1973-12-26 | 1978-03-07 | 15 | Details |
| US4074254A | Xy addressable and updateable compressed video refresh buff… | Expired / Lapsed | 1976-07-22 | 1978-02-14 | 6 | Details |
| US4074237A | Word line clamping circuit and decoder | Expired / Lapsed | 1976-03-08 | 1978-02-14 | 8 | Details |
| US4071903A | Autocorrelation function factor generating method and circu… | Expired / Lapsed | 1976-08-04 | 1978-01-31 | 11 | Details |
| US4063082A | Device generating a digital filter and a discrete convoluti… | Expired / Lapsed | 1976-03-10 | 1977-12-13 | 7 | Details |
| US4063308A | Automatic clock tuning and measuring system for LSI compute… | Expired / Lapsed | 1975-06-27 | 1977-12-13 | 14 | Details |
| US4053950A | Residual status reporting during chained cycle steal input/… | Expired / Lapsed | 1976-04-30 | 1977-10-11 | 5 | Details |
| US4050060A | Equate operand address space control system | Expired / Lapsed | 1976-04-30 | 1977-09-20 | 7 | Details |
| US4048671A | Address match for data processing system with virtual addre… | Expired / Lapsed | 1976-06-30 | 1977-09-13 | 7 | Details |
| US4044244A | Automatic tester for complex semiconductor components inclu… | Expired / Lapsed | 1976-08-06 | 1977-08-23 | 17 | Details |
| US4042913A | Address key register load/store instruction system | Expired / Lapsed | 1976-04-30 | 1977-08-16 | 6 | Details |
| US4041461A | Signal analyzer system | Expired / Lapsed | 1975-07-25 | 1977-08-09 | 43 | Details |
| US4037207A | System for controlling address keys under interrupt conditi… | Expired / Lapsed | 1976-04-30 | 1977-07-19 | 11 | Details |
| US4032899A | Apparatus and method for switching of data | Expired / Lapsed | 1976-01-19 | 1977-06-28 | 14 | Details |
| US4032982A | Adaptive voltage control of motor in an incrementing magnet… | Expired / Lapsed | 1975-08-29 | 1977-06-28 | 19 | Details |
| US4032719A | Modular slot interchange digital exchange | Expired / Lapsed | 1975-06-26 | 1977-06-28 | 18 | Details |
| US4030591A | Controls for a movable disk printer | Expired / Lapsed | 1975-09-25 | 1977-06-21 | 4 | Details |
| US4028493A | Call progress signal detector | Expired / Lapsed | 1975-12-22 | 1977-06-07 | 13 | Details |
| US4023148A | Write speed-up circuit for integrated data memories | Expired / Lapsed | 1975-11-26 | 1977-05-10 | 13 | Details |
| US4021838A | Semiconductor integrated circuit devices | Expired / Lapsed | 1975-10-20 | 1977-05-03 | 13 | Details |
| US4020462A | Method and apparatus for form removal from contour compress… | Expired / Lapsed | 1975-12-08 | 1977-04-26 | 12 | Details |
| US4020460A | Method and apparatus of checking to determine if a signal i… | Expired / Lapsed | 1975-11-13 | 1977-04-26 | 6 | Details |
| US4020466A | Memory hierarchy system with journaling and copy back | Expired / Lapsed | 1974-07-05 | 1977-04-26 | 8 | Details |
| US4016062A | Method of forming a serrated surface topography | Expired / Lapsed | 1975-09-11 | 1977-04-05 | 11 | Details |
| US4014005A | Configuration and control unit for a heterogeneous multi-sy… | Expired / Lapsed | 1976-01-05 | 1977-03-22 | 9 | Details |
| US4008460A | Circuit for implementing a modified LRU replacement algorit… | Expired / Lapsed | 1975-12-24 | 1977-02-15 | 18 | Details |
| US4007450A | Data sharing computer network | Expired / Lapsed | 1975-06-30 | 1977-02-08 | 16 | Details |
| US4007442A | Intermixed line heights and blank line formation in a buffe… | Expired / Lapsed | 1974-11-11 | 1977-02-08 | 22 | Details |
| US4001601A | Two bit partitioning circuit for a dynamic, programmed logi… | Expired / Lapsed | 1975-09-25 | 1977-01-04 | 12 | Details |
| US3999168A | Intermixed pitches in a buffered printer | Expired / Lapsed | 1974-11-11 | 1976-12-21 | 20 | Details |
| US3994793A | Reactive ion etching of aluminum | Expired / Lapsed | 1975-05-22 | 1976-11-30 | 10 | Details |
| US3993917A | Parameter independent FET sense amplifier | Expired / Lapsed | 1975-05-29 | 1976-11-23 | 31 | Details |
| US3988617A | Field effect transistor bias circuit | Expired / Lapsed | 1974-12-23 | 1976-10-26 | 10 | Details |
| US3986054A | High voltage integrated driver circuit | Expired / Lapsed | 1975-01-27 | 1976-10-12 | 6 | Details |
| US3980809A | Encoding logic for reduced bandwidth pictorial data transmi… | Expired / Lapsed | 1975-03-06 | 1976-09-14 | 10 | Details |
| US3976982A | Apparatus for image manipulation | Expired / Lapsed | 1975-05-12 | 1976-08-24 | 9 | Details |
| US3976992A | Gas display panel with light pen | Expired / Lapsed | 1975-01-03 | 1976-08-24 | 8 | Details |
| US3975772A | Double shielded magnetorestive sensing element | Expired / Lapsed | 1975-06-02 | 1976-08-17 | 16 | Details |
| US3964054A | Hierarchy response priority adjustment mechanism | Expired / Lapsed | 1975-06-23 | 1976-06-15 | 9 | Details |
| US3963841A | Catalytic surface preparation for electroless plating | Expired / Lapsed | 1975-01-06 | 1976-06-15 | 15 | Details |
| US3961139A | Time division multiplexed loop communication system with dy… | Expired / Lapsed | 1975-05-14 | 1976-06-01 | 20 | Details |
| US3961372A | Magnetic tape transport with slotted rotating head | Expired / Lapsed | 1974-07-05 | 1976-06-01 | 10 | Details |
| US3959799A | Information storage by laser beam initiated reactions | Expired / Lapsed | 1974-09-09 | 1976-05-25 | 2 | Details |
| US3956527A | Dielectrically isolated Schottky Barrier structure and meth… | Expired / Lapsed | 1974-10-03 | 1976-05-11 | 8 | Details |
| US3953839A | Bit circuitry for enhance-deplete ram | Expired / Lapsed | 1975-04-10 | 1976-04-27 | 15 | Details |
| US3949383A | D. C. Stable semiconductor memory cell | Expired / Lapsed | 1974-12-23 | 1976-04-06 | 8 | Details |
| US3938101A | Computer system with post execution I/O emulation | Expired / Lapsed | 1973-12-26 | 1976-02-10 | 20 | Details |
| US3932847A | Time-of-day clock synchronization among multiple processing… | Expired / Lapsed | 1973-11-06 | 1976-01-13 | 7 | Details |
| US3928830A | Diagnostic system for field replaceable units | Expired / Lapsed | 1974-09-19 | 1975-12-23 | 9 | Details |
| US3921137A | Semi static time division multiplex slot assignment | Expired / Lapsed | 1974-06-25 | 1975-11-18 | 14 | Details |
| US3916390A | Dynamic memory with non-volatile back-up mode | Expired / Lapsed | 1974-12-31 | 1975-10-28 | 15 | Details |
| US3913021A | High resolution digitally programmable electronic delay for… | Expired / Lapsed | 1974-04-29 | 1975-10-14 | 29 | Details |
| US3908194A | Integrated magnetoresistive read, inductive write, batch fa… | Expired / Lapsed | 1974-08-19 | 1975-09-23 | 26 | Details |
| US3906480A | Digital television display system employing coded vector gr… | Expired / Lapsed | 1973-02-23 | 1975-09-16 | 10 | Details |
| US3900836A | Interleaved memory control signal handling apparatus using … | Expired / Lapsed | 1973-11-30 | 1975-08-19 | 5 | Details |
| US3898630A | High voltage integrated driver circuit | Expired / Lapsed | 1973-10-11 | 1975-08-05 | 15 | Details |
| US3892925A | Electric signal exchange switching arrangement | Expired / Lapsed | 1974-06-03 | 1975-07-01 | 17 | Details |
| US3889243A | Stack mechanism for a data processor | Expired / Lapsed | 1973-10-18 | 1975-06-10 | 7 | Details |
| US3889169A | Position and velocity servo control for motor controlled ar… | Expired / Lapsed | 1973-10-11 | 1975-06-10 | 12 | Details |
| US3889188A | Time zero determination of FET reliability | Expired / Lapsed | 1973-07-30 | 1975-06-10 | 12 | Details |
| US3886525A | Shared data controlled by a plurality of users | Expired / Lapsed | 1973-06-29 | 1975-05-27 | 3 | Details |
| US3882326A | Differential amplifier for sensing small signals | Expired / Lapsed | 1973-12-26 | 1975-05-06 | 20 | Details |
| US3882532A | Externally accessing mechanically difficult to access circu… | Expired / Lapsed | 1973-12-26 | 1975-05-06 | 3 | Details |
| US3882355A | Flat screen display device using controlled cold cathodes | Expired / Lapsed | 1972-12-29 | 1975-05-06 | 19 | Details |
| US3881184A | Adaptive digital servo system | Expired / Lapsed | 1974-05-28 | 1975-04-29 | 21 | Details |
| US3881191A | Three-gap magnetic recording head having a single flux sens… | Expired / Lapsed | 1972-05-19 | 1975-04-29 | 10 | Details |
| US3879621A | Sense amplifier | Expired / Lapsed | 1973-04-18 | 1975-04-22 | 21 | Details |
| US3876983A | Synchronous disconnection and rearrangement | Expired / Lapsed | 1974-04-29 | 1975-04-08 | 6 | Details |
| US3873818A | Electronic tester for testing devices having a high circuit… | Expired / Lapsed | 1973-10-29 | 1975-03-25 | 62 | Details |
| US3865654A | Complementary field effect transistor having p doped silico… | Expired / Lapsed | 1974-02-11 | 1975-02-11 | 11 | Details |
| US3866176A | Address selection circuit for storage arrays | Expired / Lapsed | 1974-01-31 | 1975-02-11 | 17 | Details |
| US3849712A | Adaptive numerically controlled machine tool responsive to … | Expired / Lapsed | 1972-06-30 | 1974-11-19 | 4 | Details |
| US3848252A | Magnetic keyboard | Expired / Lapsed | 1972-02-24 | 1974-11-12 | 4 | Details |
| US3842405A | Communications control unit | Expired / Lapsed | 1972-02-15 | 1974-10-15 | 11 | Details |
| US3840898A | Self-biased magnetoresistive sensor | Expired / Lapsed | 1972-12-29 | 1974-10-08 | 21 | Details |
| US3840809A | Non-destructive measurement of dielectric properties | Expired / Lapsed | 1972-12-04 | 1974-10-08 | 19 | Details |
| US3836892A | D.c. stable electronic storage utilizing a.c. stable storag… | Expired / Lapsed | 1972-06-29 | 1974-09-17 | 11 | Details |
| US3833900A | Image compaction system | Expired / Lapsed | 1972-08-18 | 1974-09-03 | 7 | Details |
| US3830972A | Sensitivity compensation for a self scanned photodiode array | Expired / Lapsed | 1972-11-13 | 1974-08-20 | 10 | Details |
| US3831076A | Sector scanning control system | Expired / Lapsed | 1972-03-17 | 1974-08-20 | 11 | Details |
| US3829896A | Bias means for batch fabricated magnetic head and method of… | Expired / Lapsed | 1972-11-08 | 1974-08-13 | 24 | Details |
| US3828327A | Simplified storage protection and address translation under… | Expired / Lapsed | 1973-04-30 | 1974-08-06 | 23 | Details |
| US3825901A | Integrated diagnostic tool | Expired / Lapsed | 1972-11-09 | 1974-07-23 | 11 | Details |
| US3823416A | Flying magnetic transducer assembly having three rails | Expired / Lapsed | 1973-03-01 | 1974-07-09 | 12 | Details |
| US3821713A | Multiple station receiver controlled transmission loop inte… | Expired / Lapsed | 1972-12-29 | 1974-06-28 | 12 | Details |
| US3818447A | Priority data handling system and method | Expired / Lapsed | 1973-03-16 | 1974-06-18 | 14 | Details |
| US3814917A | Signal processing device for weighting delta coded sequence… | Expired / Lapsed | 1973-05-29 | 1974-06-04 | 4 | Details |
| US3814863A | Internally biased magnetoresistive magnetic transducer | Expired / Lapsed | 1972-10-11 | 1974-06-04 | 29 | Details |
| US3815025A | Large-scale integrated circuit testing structure | Expired / Lapsed | 1971-10-18 | 1974-06-04 | 7 | Details |
| US3813692A | Internally biased magnetoresistive magnetic transducer | Expired / Lapsed | 1972-10-11 | 1974-05-28 | 13 | Details |
| US3813485A | System for compression of digital data | Expired / Lapsed | 1972-01-05 | 1974-05-28 | 23 | Details |
| US3812413A | Drive circuit for inductive load | Expired / Lapsed | 1972-03-06 | 1974-05-21 | 6 | Details |
| US3811117A | Time ordered memory system and operation | Expired / Lapsed | 1972-10-19 | 1974-05-14 | 20 | Details |
| US3806885A | Polling mechanism for transferring control from one data pr… | Expired / Lapsed | 1972-12-29 | 1974-04-23 | 12 | Details |
| US3806888A | Hierarchial memory system | Expired / Lapsed | 1972-12-04 | 1974-04-23 | 17 | Details |
| US3803554A | Apparatus for addressing an electronic data storage | Expired / Lapsed | 1972-04-27 | 1974-04-09 | 4 | Details |
| US3801962A | Communication mechanism for data transfer and control betwe… | Expired / Lapsed | 1972-12-29 | 1974-04-02 | 8 | Details |
| US3800078A | Digitally compensated scanning system | Expired / Lapsed | 1972-12-18 | 1974-03-26 | 12 | Details |
| US3800291A | Data processing system memory relocation apparatus and meth… | Expired / Lapsed | 1972-09-21 | 1974-03-26 | 12 | Details |
| US3798359A | Block cipher cryptographic system | Expired / Lapsed | 1971-06-30 | 1974-03-19 | 15 | Details |
| US3797000A | Non-volatile semiconductor storage device utilizing avalanc… | Expired / Lapsed | 1972-12-29 | 1974-03-12 | 12 | Details |
| US3796830A | Recirculating block cipher cryptographic system | Expired / Lapsed | 1971-11-02 | 1974-03-12 | 11 | Details |
| US3796613A | Method of forming dielectric isolation for high density ped… | Expired / Lapsed | 1971-06-18 | 1974-03-12 | 0 | Details |
| US3795828A | Monolithic decoder circuit | Expired / Lapsed | 1973-03-08 | 1974-03-05 | 21 | Details |
| US3795908A | Gas panel with multi-directional shifting arrangement | Expired / Lapsed | 1972-06-13 | 1974-03-05 | 12 | Details |
| US3793090A | Method for stabilizing fet devices having silicon gates and… | Expired / Lapsed | 1972-11-21 | 1974-02-19 | 10 | Details |
| US3792268A | Document scanner having optical diffusion means | Expired / Lapsed | 1972-01-06 | 1974-02-12 | 15 | Details |
| US3791858A | Method of forming multi-layer circuit panels | Expired / Lapsed | 1971-12-13 | 1974-02-12 | 10 | Details |
| US3787669A | Test pattern generator | Expired / Lapsed | 1972-06-30 | 1974-01-22 | 11 | Details |
| US3786427A | Dynamic address translation reversed | Expired / Lapsed | 1971-06-29 | 1974-01-15 | 4 | Details |
| US3784907A | Method of propagation delay testing a functional logic syst… | Expired / Lapsed | 1972-10-16 | 1974-01-08 | 10 | Details |
| US3777222A | Modular touch sensitive indicating panels with touch and li… | Expired / Lapsed | 1972-05-12 | 1973-12-04 | 44 | Details |
| US3771144A | Clock for computer performance measurements | Expired / Lapsed | 1972-07-24 | 1973-11-06 | 8 | Details |
| US3771137A | Memory control in a multipurpose system utilizing a broadca… | Expired / Lapsed | 1971-09-10 | 1973-11-06 | 27 | Details |
| US3771136A | Control unit | Expired / Lapsed | 1971-04-29 | 1973-11-06 | 5 | Details |
| US3769453A | Finite memory adaptive predictor | Expired / Lapsed | 1972-08-17 | 1973-10-30 | 8 | Details |
| US3766533A | Processor utilizing one holographic array and a plurality o… | Expired / Lapsed | 1972-05-30 | 1973-10-16 | 18 | Details |
| US3764742A | Cryptographic identification system | Expired / Lapsed | 1971-12-23 | 1973-10-09 | 13 | Details |
| US3763470A | Circuit arrangement for error detection in data processing … | Expired / Lapsed | 1972-01-20 | 1973-10-02 | 11 | Details |
| US3761883A | Storage protect key array for a multiprocessing system | Expired / Lapsed | 1972-01-20 | 1973-09-25 | 4 | Details |
| US3761881A | Translation storage scheme for virtual memory system | Expired / Lapsed | 1971-06-30 | 1973-09-25 | 3 | Details |
| US3760365A | Multiprocessing computing system with task assignment at th… | Expired / Lapsed | 1971-12-30 | 1973-09-18 | 18 | Details |
| US3757334A | Stabilized communication and control system | Expired / Lapsed | 1968-02-29 | 1973-09-04 | 21 | Details |
| US3755793A | Latent image memory with single-device cells of two types | Expired / Lapsed | 1972-04-13 | 1973-08-28 | 35 | Details |
| US3754211A | Fast error recovery communication controller | Expired / Lapsed | 1971-12-30 | 1973-08-21 | 7 | Details |
| US3753157A | Leaky wave couplers for guided elastic wave and guided opti… | Expired / Lapsed | 1971-06-30 | 1973-08-14 | 15 | Details |
| US3750189A | Light scanning and printing system | Expired / Lapsed | 1971-10-18 | 1973-07-31 | 22 | Details |
| US3746973A | Testing of metallization networks on insulative substrates … | Expired / Lapsed | 1972-05-05 | 1973-07-17 | 8 | Details |
| US3744899A | Method of preparing documents | Expired / Lapsed | 1970-06-11 | 1973-07-10 | 5 | Details |
| US3744033A | Text formatting for display | Expired / Lapsed | 1972-01-21 | 1973-07-03 | 6 | Details |
| US3740730A | Latchable decoder driver and memory array | Expired / Lapsed | 1971-06-30 | 1973-06-19 | 11 | Details |
| US3740723A | Integral hierarchical binary storage element | Expired / Lapsed | 1970-12-28 | 1973-06-19 | 4 | Details |
| US3737870A | Status switching arrangement | Expired / Lapsed | 1972-04-24 | 1973-06-05 | 11 | Details |
| US3737637A | Data generator | Expired / Lapsed | 1971-12-13 | 1973-06-05 | 20 | Details |
| US3737855A | Character video enhancement system | Expired / Lapsed | 1971-09-30 | 1973-06-05 | 15 | Details |
| US3736574A | Pseudo-hierarchy memory system | Expired / Lapsed | 1971-12-30 | 1973-05-29 | 27 | Details |
| US3736569A | System for controlling power consumption in a computer | Expired / Lapsed | 1971-10-13 | 1973-05-29 | 8 | Details |
| US3736566A | Central processing unit with hardware controlled checkpoint… | Expired / Lapsed | 1971-08-18 | 1973-05-29 | 8 | Details |
| US3736477A | Monolithic semiconductor circuit for a logic circuit concep… | Expired / Lapsed | 1971-04-14 | 1973-05-29 | 19 | Details |
| US3735357A | Priority system for a communication control unit | Expired / Lapsed | 1972-09-19 | 1973-05-22 | 6 | Details |
| US3735360A | High speed buffer operation in a multi-processing system | Expired / Lapsed | 1971-08-25 | 1973-05-22 | 10 | Details |
| US3732374A | Communication system and method | Expired / Lapsed | 1970-12-31 | 1973-05-08 | 34 | Details |
| US3731177A | Disc file head movement control system | Expired / Lapsed | 1971-12-15 | 1973-05-01 | 30 | Details |
| US3729713A | Data processing peripheral subsystems | Expired / Lapsed | 1971-08-04 | 1973-04-24 | 31 | Details |
| US3727173A | Zero-insertion force connector | Expired / Lapsed | 1971-12-06 | 1973-04-10 | 10 | Details |
| US3727005A | Delta modulation system with randomly timed multiplexing ca… | Expired / Lapsed | 1971-06-30 | 1973-04-10 | 16 | Details |
| US3725864A | Input/output control | Expired / Lapsed | 1971-03-03 | 1973-04-03 | 72 | Details |
| US3723976A | Memory system with logical and real addressing | Expired / Lapsed | 1972-01-20 | 1973-03-27 | 13 | Details |
| US3723971A | Serial loop communications system | Expired / Lapsed | 1971-12-14 | 1973-03-27 | 7 | Details |
| US3723975A | Overdue event detector | Expired / Lapsed | 1971-06-28 | 1973-03-27 | 9 | Details |
| US3723199A | Outdiffusion epitaxial self-isolation technique for making … | Expired / Lapsed | 1969-11-10 | 1973-03-27 | 0 | Details |
| US3721961A | Data processing subsystems | Expired / Lapsed | 1971-08-11 | 1973-03-20 | 16 | Details |
| US3720921A | Recording in reversible, photochromic medium | Expired / Lapsed | 1970-07-14 | 1973-03-13 | 12 | Details |
| US3717563A | Method of adhering gold to an insulating layer on a semicon… | Expired / Lapsed | 1971-06-09 | 1973-02-20 | 0 | Details |
| US3716837A | Interrupt handling | Expired / Lapsed | 1971-04-22 | 1973-02-13 | 0 | Details |
| US3715729A | Timing control for a multiprocessor system | Expired / Lapsed | 1971-03-10 | 1973-02-06 | 12 | Details |
| US3707455A | Measuring system | Expired / Lapsed | 1968-07-15 | 1972-12-26 | 0 | Details |
| US3706974A | Interface multiplexer | Expired / Lapsed | 1971-10-27 | 1972-12-19 | 7 | Details |
| US3704363A | Statistical and environmental data logging system for data … | Expired / Lapsed | 1971-06-09 | 1972-11-28 | 4 | Details |
| US3702926A | Fet decode circuit | Expired / Lapsed | 1970-09-30 | 1972-11-14 | 30 | Details |
| US3702464A | Information card | Expired / Lapsed | 1971-05-04 | 1972-11-07 | 2 | Details |
| US3702006A | Method for balancing the utilization of input/output devices | Expired / Lapsed | 1971-06-09 | 1972-10-31 | 26 | Details |
| US3701099A | Dynamic discrimination reference level generator for a para… | Expired / Lapsed | 1971-06-08 | 1972-10-24 | 14 | Details |
| US3700873A | Structured computer notation and system architecture utiliz… | Expired / Lapsed | 1970-04-06 | 1972-10-24 | 24 | Details |
| US3699530A | Input/output system with dedicated channel buffering | Expired / Lapsed | 1970-12-30 | 1972-10-17 | 12 | Details |
| US3693165A | Parallel addressing of a storage hierarchy in a data proces… | Expired / Lapsed | 1971-06-29 | 1972-09-19 | 27 | Details |
| US3692936A | Acoustic coordinate data determination system | Expired / Lapsed | 1970-06-18 | 1972-09-19 | 14 | Details |
| US3688280A | Monolithic memory system with bi-level powering for reduced… | Expired / Lapsed | 1970-09-22 | 1972-08-29 | 15 | Details |
| US3681682A | Method and apparatus for testing gap surface finish and win… | Expired / Lapsed | 1970-12-21 | 1972-08-01 | 18 | Details |
| US3680054A | Input/output channel | Expired / Lapsed | 1970-07-06 | 1972-07-25 | 14 | Details |
| US3678475A | Read only memory and method of using same | Expired / Lapsed | 1971-02-01 | 1972-07-18 | 28 | Details |
| US3676860A | Interactive tie-breaking system | Expired / Lapsed | 1970-12-28 | 1972-07-11 | 12 | Details |
| US3676616A | Eds serial switch array | Expired / Lapsed | 1970-12-21 | 1972-07-11 | 19 | Details |
| US3676644A | Coded document and system for automatically reading same | Expired / Lapsed | 1970-03-05 | 1972-07-11 | 18 | Details |
| US3675133A | Apparatus and method independently varying the widths of a … | Expired / Lapsed | 1971-06-21 | 1972-07-04 | 17 | Details |
| US3675216A | No clock shift register and control technique | Expired / Lapsed | 1971-01-08 | 1972-07-04 | 11 | Details |
| US3675217A | Sequence interlocking and priority apparatus | Expired / Lapsed | 1969-12-23 | 1972-07-04 | 22 | Details |
| US3673575A | Microprogrammed common control unit with double format cont… | Expired / Lapsed | 1970-06-29 | 1972-06-27 | 8 | Details |
| US3670309A | Storage control system | Expired / Lapsed | 1969-12-23 | 1972-06-13 | 33 | Details |
| US3670307A | Interstorage transfer mechanism | Expired / Lapsed | 1969-12-23 | 1972-06-13 | 11 | Details |
| US3668651A | Working device code method of i/o control | Expired / Lapsed | 1970-12-30 | 1972-06-06 | 15 | Details |
| US3668658A | Magnetic record disk cover | Expired / Lapsed | 1969-12-22 | 1972-06-06 | 9 | Details |
| US3665513A | Passive magnetic transfer of discrete magnetic information | Expired / Lapsed | 1969-12-29 | 1972-05-23 | 13 | Details |
| US3665418A | Status switching in an automatically repaired computer | Expired / Lapsed | 1968-07-15 | 1972-05-23 | 16 | Details |
| US3662348A | Message assembly and response system | Expired / Lapsed | 1970-06-30 | 1972-05-09 | 11 | Details |
| US3660616A | Dictating and transcribing systems featuring random sentenc… | Expired / Lapsed | 1970-06-29 | 1972-05-02 | 8 | Details |
| US3659273A | Error checking arrangement | Expired / Lapsed | 1970-05-26 | 1972-04-25 | 4 | Details |
| US3655457A | Method of making or modifying a pn-junction by ion implanta… | Expired / Lapsed | 1968-08-06 | 1972-04-11 | 30 | Details |
| US3654617A | Microprogrammable i/o controller | Expired / Lapsed | 1970-10-01 | 1972-04-04 | 26 | Details |
| US3654615A | Element placement system | Expired / Lapsed | 1965-12-01 | 1972-04-04 | 23 | Details |
| US3651485A | Holographic data processing system | Expired / Lapsed | 1969-10-16 | 1972-03-21 | 10 | Details |
| US3650737A | Imaging method using photoconductive element having a prote… | Expired / Lapsed | 1968-03-25 | 1972-03-21 | 1 | Details |
| US3647977A | Multiplexer | Expired / Lapsed | 1970-05-07 | 1972-03-07 | 15 | Details |
| US3648271A | Visual editing system incorporating selectable letter spaci… | Expired / Lapsed | 1970-03-02 | 1972-03-07 | 10 | Details |
| US3648254A | High-speed associative memory | Expired / Lapsed | 1969-12-31 | 1972-03-07 | 23 | Details |
| US3646525A | Data regeneration scheme without using memory sense amplifi… | Expired / Lapsed | 1970-01-12 | 1972-02-29 | 9 | Details |
| US3644902A | Memory with reconfiguration to avoid uncorrectable errors | Expired / Lapsed | 1970-05-18 | 1972-02-22 | 14 | Details |
| US3643116A | Fast logic using ultrashort laser pulses | Expired / Lapsed | 1969-09-05 | 1972-02-15 | 29 | Details |
| US3641558A | Multiplexed video generation | Expired / Lapsed | 1969-11-21 | 1972-02-08 | 8 | Details |
| US3640271A | Blood flow pressure measurement technique employing injecte… | Expired / Lapsed | 1969-06-30 | 1972-02-08 | 9 | Details |
| US3639904A | Data communication system of loop configuration and serial … | Expired / Lapsed | 1970-05-05 | 1972-02-01 | 19 | Details |
| US3639694A | Time division multiplex communications system | Expired / Lapsed | 1969-01-15 | 1972-02-01 | 18 | Details |
| US3636443A | Method of testing devices using untested devices as a refer… | Expired / Lapsed | 1970-10-29 | 1972-01-18 | 15 | Details |
| US3633995A | Acousto-optic light deflection system | Expired / Lapsed | 1970-02-17 | 1972-01-11 | 10 | Details |
| US3634665A | System use of self-testing checking circuits | Expired / Lapsed | 1969-06-30 | 1972-01-11 | 10 | Details |
| US3633186A | Transducer accessing mechanism utilizing centrifugal force | Expired / Lapsed | 1970-07-02 | 1972-01-04 | 9 | Details |
| US3633170A | Digital filter and threshold circuit | Expired / Lapsed | 1970-06-09 | 1972-01-04 | 13 | Details |
| US3633100A | Testing of nonlinear circuits by comparison with a referenc… | Expired / Lapsed | 1970-05-12 | 1972-01-04 | 51 | Details |
| US3629853A | Data-processing element | Expired / Lapsed | 1959-06-30 | 1971-12-21 | 58 | Details |
| US3626334A | Electrically variable acoustic delay line | Expired / Lapsed | 1969-12-30 | 1971-12-07 | 16 | Details |
| US3623022A | Multiplexing system for interleaving operations of a proces… | Expired / Lapsed | 1969-12-29 | 1971-11-23 | 13 | Details |
| US3622767A | Adaptive control system and method | Expired / Lapsed | 1967-01-16 | 1971-11-23 | 14 | Details |
| US3621346A | Process for forming semiconductor devices with polycrystall… | Expired / Lapsed | 1970-01-28 | 1971-11-16 | 5 | Details |
| US3619507A | Transmit only acoustic coupler | Expired / Lapsed | 1969-08-22 | 1971-11-09 | 7 | Details |
| US3617378A | Magnetic recording media | Expired / Lapsed | 1969-09-29 | 1971-11-02 | 4 | Details |
| US3614608A | Random number statistical logic test system | Expired / Lapsed | 1969-05-19 | 1971-10-19 | 14 | Details |
| US3612698A | Automatic holographic wafer positioning system and method | Expired / Lapsed | 1969-05-01 | 1971-10-12 | 13 | Details |
| US3611307A | Execution unit shared by plurality of arrays of virtual pro… | Expired / Lapsed | 1969-04-03 | 1971-10-05 | 13 | Details |
| US3610902A | Electronic statistical calculator and display system | Expired / Lapsed | 1968-10-07 | 1971-10-05 | 19 | Details |
| US3609393A | Bidirectional dynamic shift register | Expired / Lapsed | 1969-06-30 | 1971-09-28 | 30 | Details |
| US3609712A | Insulated gate field effect transistor memory array | Expired / Lapsed | 1969-01-15 | 1971-09-28 | 29 | Details |
| US3602703A | Power demand predicting control system | Expired / Lapsed | 1969-10-20 | 1971-08-31 | 11 | Details |
| US3601807A | Centralized crosspoint switching unit | Expired / Lapsed | 1969-01-13 | 1971-08-24 | 13 | Details |
| US3599151A | Character recognition photosensing apparatus having a thres… | Expired / Lapsed | 1969-12-29 | 1971-08-10 | 12 | Details |
| US3593297A | Diagnostic system for trapping circuitry | Expired / Lapsed | 1970-02-12 | 1971-07-13 | 7 | Details |
| US3593300A | Arrangement for automatically selecting units for task exec… | Expired / Lapsed | 1967-11-13 | 1971-07-13 | 8 | Details |
| US3591482A | Silver-silver chloride electrode and method of making same | Expired / Lapsed | 1969-04-23 | 1971-07-06 | 0 | Details |
| US3591480A | Glucose measuring system | Expired / Lapsed | 1968-07-15 | 1971-07-06 | 0 | Details |
| US3588839A | Hierarchical memory updating system | Expired / Lapsed | 1969-01-15 | 1971-06-28 | 0 | Details |
| US3588855A | Data gap responding apparatus | Expired / Lapsed | 1968-10-14 | 1971-06-28 | 0 | Details |
| US3585500A | Dynamic time/voltage test system | Expired / Lapsed | 1969-08-11 | 1971-06-15 | 17 | Details |
| US3585605A | Associative memory data processor | Expired / Lapsed | 1969-05-28 | 1971-06-15 | 17 | Details |
| US3585088A | Methods of producing single crystals on supporting substrat… | Expired / Lapsed | 1968-10-18 | 1971-06-15 | 0 | Details |
| US3585599A | Universal system service adapter | Expired / Lapsed | 1968-07-09 | 1971-06-15 | 41 | Details |
| US3584205A | Binary arithmetic and logic manipulator | Expired / Lapsed | 1968-10-14 | 1971-06-08 | 13 | Details |
| US3582901A | Random data acquisition interface system | Expired / Lapsed | 1968-10-01 | 1971-06-01 | 36 | Details |
| US3581286A | Module switching apparatus with status sensing and dynamic … | Expired / Lapsed | 1969-01-13 | 1971-05-25 | 30 | Details |
| US3578906A | Close circuit television measurement system | Expired / Lapsed | 1969-11-24 | 1971-05-18 | 16 | Details |
| US3576969A | Solder reflow device | Expired / Lapsed | 1969-09-02 | 1971-05-04 | 2 | Details |
| US3577189A | Apparatus and method in a digital computer for allowing imp… | Expired / Lapsed | 1969-01-15 | 1971-05-04 | 20 | Details |
| US3576544A | Storage protection system | Expired / Lapsed | 1968-10-18 | 1971-04-27 | 6 | Details |
| US3576553A | Data transducer positioning servo utilizing compensation ne… | Expired / Lapsed | 1968-04-29 | 1971-04-27 | 24 | Details |
| US3575301A | Manipulator | Expired / Lapsed | 1968-01-02 | 1971-04-20 | 35 | Details |
| US3573730A | Stored logic recognition device | Expired / Lapsed | 1969-10-15 | 1971-04-06 | 10 | Details |
| US3573749A | Operator guidance and control termianl | Expired / Lapsed | 1969-03-28 | 1971-04-06 | 10 | Details |
| US3573758A | Non-linear impedance means for transistors connected to eac… | Expired / Lapsed | 1969-02-27 | 1971-04-06 | 38 | Details |
| US3573728A | Memory with error correction for partial store operation | Expired / Lapsed | 1969-01-09 | 1971-04-06 | 12 | Details |
| US3573789A | Method and apparatus for increasing image resolution | Expired / Lapsed | 1968-12-13 | 1971-04-06 | 12 | Details |
| US3573741A | Control unit for input/output devices | Expired / Lapsed | 1968-07-11 | 1971-04-06 | 15 | Details |
| US3573736A | Interruption and interlock arrangement | Expired / Lapsed | 1968-01-15 | 1971-04-06 | 5 | Details |
| US3573738A | Demand computer system for machine tool control | Expired / Lapsed | 1968-01-15 | 1971-04-06 | 10 | Details |
| US3573737A | Reduction of processor loading in a demand computer system … | Expired / Lapsed | 1968-01-15 | 1971-04-06 | 8 | Details |
| US3573099A | Process for making garnet films | Expired / Lapsed | 1969-12-22 | 1971-03-30 | 0 | Details |
| US3571806A | Variable-speed line adapter for synchronous transmissions | Expired / Lapsed | 1969-01-14 | 1971-03-23 | 8 | Details |
| US3571733A | Adaptive delay line equalizer for waveforms with correlatio… | Expired / Lapsed | 1968-09-13 | 1971-03-23 | 8 | Details |
| US3569938A | Storage manager | Expired / Lapsed | 1967-12-20 | 1971-03-09 | 21 | Details |
| US3567852A | Film display system | Expired / Lapsed | 1968-10-01 | 1971-03-02 | 11 | Details |
| US3568155A | Method of storing and retrieving records | Expired / Lapsed | 1967-04-10 | 1971-03-02 | 11 | Details |
| US3566363A | Processor to processor communication in a multiprocessor co… | Expired / Lapsed | 1968-07-11 | 1971-02-23 | 0 | Details |
| US3564145A | Serial loop data transmission system fault locator | Expired / Lapsed | 1969-04-30 | 1971-02-16 | 9 | Details |
| US3564595A | Data interpolation for computer control of machine tools | Expired / Lapsed | 1968-11-19 | 1971-02-16 | 0 | Details |
| US3564506A | Instruction retry byte counter | Expired / Lapsed | 1968-01-17 | 1971-02-16 | 0 | Details |
| US3564502A | Channel position signaling method and means | Expired / Lapsed | 1968-01-15 | 1971-02-16 | 0 | Details |
| US3560934A | Arrangement for effecting vector mode operation in multipro… | Expired / Lapsed | 1969-06-10 | 1971-02-02 | 0 | Details |
| US3560930A | Method and apparatus for reducing data in a pattern recogni… | Expired / Lapsed | 1968-01-15 | 1971-02-02 | 0 | Details |
| US3560754A | Photoelectric particle separator using time delay | Expired / Lapsed | 1965-11-17 | 1971-02-02 | 21 | Details |
| US3559181A | Crt parameter error indicator panel | Expired / Lapsed | 1967-12-14 | 1971-01-26 | 0 | Details |
| US3553655A | Short forward conditional skip hardware | Expired / Lapsed | 1969-03-28 | 1971-01-05 | 0 | Details |
| US3552383A | Method and system for estimation of arterial pressure | Expired / Lapsed | 1969-01-08 | 1971-01-05 | 33 | Details |
| US3551892A | Interaction in a multi-processing system utilizing central … | Expired / Lapsed | 1969-01-15 | 1970-12-29 | 0 | Details |
| US3551836A | Differential amplifier circuit adapted for monolithic fabri… | Expired / Lapsed | 1968-01-17 | 1970-12-29 | 0 | Details |
| US3551895A | Look-ahead branch detection system | Expired / Lapsed | 1968-01-15 | 1970-12-29 | 0 | Details |
| US3550133A | Automatic channel apparatus | Expired / Lapsed | 1969-01-14 | 1970-12-22 | 0 | Details |
| US3547716A | Isolation in epitaxially grown monolithic devices | Expired / Lapsed | 1968-09-05 | 1970-12-15 | 0 | Details |
| US3548177A | Computer error anticipator and cycle extender | Expired / Lapsed | 1968-01-18 | 1970-12-15 | 0 | Details |
| US3548385A | Adaptive information retrieval system | Expired / Lapsed | 1968-01-11 | 1970-12-15 | 0 | Details |
| US3546582A | Computer controlled test system for performing functional t… | Expired / Lapsed | 1968-01-15 | 1970-12-08 | 0 | Details |
| US3544966A | Method and apparatus for multiplex control of a plurality o… | Expired / Lapsed | 1966-12-27 | 1970-12-01 | 0 | Details |
| US3543242A | Multiple level priority system | Expired / Lapsed | 1967-07-07 | 1970-11-24 | 0 | Details |
| US3542448A | Holographic recording and readout of digital information | Expired / Lapsed | 1967-01-13 | 1970-11-24 | 0 | Details |
| US3541529A | Replacement system | Expired / Lapsed | 1969-09-22 | 1970-11-17 | 0 | Details |
| US3541441A | Test system for evaluating amplitude and response character… | Expired / Lapsed | 1969-02-17 | 1970-11-17 | 0 | Details |
| US3541528A | Implicit load and store mechanism | Expired / Lapsed | 1969-01-06 | 1970-11-17 | 0 | Details |
| US3541524A | Time division communications processor | Expired / Lapsed | 1968-03-14 | 1970-11-17 | 0 | Details |
| US3541507A | Error checked selection circuit | Expired / Lapsed | 1967-12-06 | 1970-11-17 | 0 | Details |
| US3541516A | Vector arithmetic multiprocessor computing system | Expired / Lapsed | 1965-06-30 | 1970-11-17 | 0 | Details |
| US3540003A | Computer monitoring system | Expired / Lapsed | 1968-06-10 | 1970-11-10 | 0 | Details |
| US3540002A | Content addressable memory | Expired / Lapsed | 1968-02-26 | 1970-11-10 | 0 | Details |
| US3540000A | Criss-cross sorting method and means | Expired / Lapsed | 1967-11-02 | 1970-11-10 | 0 | Details |
| US3539994A | Adaptive template pattern categorizing system | Expired / Lapsed | 1967-09-14 | 1970-11-10 | 0 | Details |
| US3539993A | High-speed registration technique for position code scanning | Expired / Lapsed | 1967-02-28 | 1970-11-10 | 0 | Details |
| US3535699A | Complenmentary transistor memory cell using leakage current… | Expired / Lapsed | 1968-01-15 | 1970-10-20 | 0 | Details |
| US3534470A | Process for assembling magnetic tape heads using a consumab… | Expired / Lapsed | 1968-01-04 | 1970-10-20 | 0 | Details |
| US3534344A | Method and apparatus for recording and detecting information | Expired / Lapsed | 1967-12-21 | 1970-10-13 | 0 | Details |
| US3534334A | Automatic control of a threshold in the digitization of an … | Expired / Lapsed | 1967-06-20 | 1970-10-13 | 0 | Details |
| US3532412A | Package for and method of packaging pathology specimens | Expired / Lapsed | 1969-01-17 | 1970-10-06 | 0 | Details |
| US3532431A | Shearing interferometry by means of holography | Expired / Lapsed | 1968-02-05 | 1970-10-06 | 0 | Details |
| US3533075A | Dynamic address translation unit with look-ahead | Expired / Lapsed | 1967-10-19 | 1970-10-06 | 0 | Details |
| US3528062A | Program interlock arrangement,including task suspension and… | Expired / Lapsed | 1968-07-05 | 1970-09-08 | 0 | Details |
| US3528061A | Interlock arrangement | Expired / Lapsed | 1968-07-05 | 1970-09-08 | 0 | Details |
| US3528058A | Character recognition system | Expired / Lapsed | 1966-05-27 | 1970-09-08 | 0 | Details |
| US3524113A | Complementary pnp-npn transistors and fabrication method th… | Expired / Lapsed | 1967-06-15 | 1970-08-11 | 0 | Details |
| US3523824A | Metallization of plastic materials | Expired / Lapsed | 1966-12-29 | 1970-08-11 | 0 | Details |
| US3524182A | Display system | Expired / Lapsed | 1966-06-13 | 1970-08-11 | 0 | Details |
| US3523229A | Digital-analog servo system | Expired / Lapsed | 1967-01-05 | 1970-08-04 | 0 | Details |
| US3517337A | Modulation of scanning beams in injection lasers | Expired / Lapsed | 1967-10-26 | 1970-06-23 | 0 | Details |
| US3516021A | Field effect transistor microwave generator | Expired / Lapsed | 1967-12-05 | 1970-06-02 | 0 | Details |
| US3508038A | Multiplying apparatus for performing division using success… | Expired / Lapsed | 1966-08-30 | 1970-04-21 | 0 | Details |
| US3505573A | Low standby power memory cell | Expired / Lapsed | 1968-09-30 | 1970-04-07 | 0 | Details |
| US3505598A | Pulse measuring system | Expired / Lapsed | 1967-08-28 | 1970-04-07 | 0 | Details |
| US3504112A | Two-dimensional image data encoding and decoding | Expired / Lapsed | 1966-01-20 | 1970-03-31 | 0 | Details |
| US3500301A | Sonic detection apparatus | Expired / Lapsed | 1967-10-23 | 1970-03-10 | 0 | Details |
| US3500328A | Data system microprogramming control | Expired / Lapsed | 1966-06-20 | 1970-03-10 | 0 | Details |
| US3499124A | Fm recording and reproducing arrangement with single carrie… | Expired / Lapsed | 1966-11-07 | 1970-03-03 | 0 | Details |
| US3497613A | Display device with video signals interleaved in segments o… | Expired / Lapsed | 1966-03-25 | 1970-02-24 | 0 | Details |
| US3497685A | Fault location system | Expired / Lapsed | 1965-11-03 | 1970-02-24 | 0 | Details |
| US3496551A | Task selection in a multi-processor computing system | Expired / Lapsed | 1967-07-13 | 1970-02-17 | 0 | Details |
| US3493932A | Integrated switching matrix comprising field-effect devices | Expired / Lapsed | 1966-01-17 | 1970-02-03 | 0 | Details |
| US3492648A | Keyboard selection system | Expired / Lapsed | 1969-04-09 | 1970-01-27 | 0 | Details |
| US3492572A | Programmable electronic circuit testing apparatus having pl… | Expired / Lapsed | 1966-10-10 | 1970-01-27 | 0 | Details |
| US3492646A | Cross correlation and decision making apparatus | Expired / Lapsed | 1965-04-26 | 1970-01-27 | 0 | Details |
| US3491325A | Temperature compensation for semiconductor devices | Expired / Lapsed | 1967-02-15 | 1970-01-20 | 0 | Details |
| US3489622A | Method of making high frequency transistors | Expired / Lapsed | 1967-05-18 | 1970-01-13 | 0 | Details |
| US3488106A | Spatial filtering system for performing differentiation | Expired / Lapsed | 1966-10-18 | 1970-01-06 | 0 | Details |
| US3485245A | Portable fluid heater | Expired / Lapsed | 1967-06-21 | 1969-12-23 | 0 | Details |
| US3484167A | Formation flight control system | Expired / Lapsed | 1967-07-11 | 1969-12-16 | 0 | Details |
| US3482057A | Automatic intercept system | Expired / Lapsed | 1966-01-28 | 1969-12-02 | 0 | Details |
| US3480914A | Control mechanism for a multi-processor computing system | Expired / Lapsed | 1967-01-03 | 1969-11-25 | 0 | Details |
| US3479523A | Integrated nor logic circuit | Expired / Lapsed | 1966-09-26 | 1969-11-18 | 0 | Details |
| US3479642A | Threshold system | Expired / Lapsed | 1966-02-21 | 1969-11-18 | 0 | Details |
| US3479493A | Digital controller with automatic balance and manually adju… | Expired / Lapsed | 1966-01-17 | 1969-11-18 | 0 | Details |
| US3478325A | Delay line data transfer apparatus | Expired / Lapsed | 1967-01-16 | 1969-11-11 | 0 | Details |
| US3478321A | Variable priority storage accessing control | Expired / Lapsed | 1966-11-10 | 1969-11-11 | 0 | Details |
| US3478286A | System for automatically testing computer memories | Expired / Lapsed | 1965-07-01 | 1969-11-11 | 0 | Details |
| US3477063A | Controller for data processing system | Expired / Lapsed | 1967-10-26 | 1969-11-04 | 0 | Details |
| US3473115A | Method and apparatus for testing magnetostrictive delay lin… | Expired / Lapsed | 1966-12-30 | 1969-10-14 | 0 | Details |
| US3472074A | Maximum thermometer for surface temperature measurements | Expired / Lapsed | 1966-12-29 | 1969-10-14 | 0 | Details |
| US3471832A | Character recognition apparatus | Expired / Lapsed | 1965-07-06 | 1969-10-07 | 0 | Details |
| US3467777A | Data transmission with phase encoding of binary state trans… | Expired / Lapsed | 1965-10-15 | 1969-09-16 | 0 | Details |
| US3466613A | Instruction buffering system | Expired / Lapsed | 1967-01-13 | 1969-09-09 | 0 | Details |
| US3466394A | Voice verification system | Expired / Lapsed | 1966-05-02 | 1969-09-09 | 0 | Details |
| US3466616A | Memory device and method using dichroic defects | Expired / Lapsed | 1965-10-22 | 1969-09-09 | 0 | Details |
| US3466603A | Scanner threshold adjusting circuit | Expired / Lapsed | 1965-06-22 | 1969-09-09 | 0 | Details |
| US3465299A | Information translating data comparing systems | Expired / Lapsed | 1967-01-26 | 1969-09-02 | 0 | Details |
| US3463985A | Closed loop stepping motor control system | Expired / Lapsed | 1965-06-10 | 1969-08-26 | 0 | Details |
| US3462744A | Execution unit with a common operand and resulting bussing … | Expired / Lapsed | 1966-09-28 | 1969-08-19 | 0 | Details |
| US3462737A | Character size measuring and normalizing for character reco… | Expired / Lapsed | 1964-12-18 | 1969-08-19 | 1 | Details |
| US3461454A | Position identifying device | Expired / Lapsed | 1968-06-06 | 1969-08-12 | 0 | Details |
| US3458786A | Movable element positioning system with coarse and fine inc… | Expired / Lapsed | 1966-07-11 | 1969-07-29 | 0 | Details |
| US3458821A | Variable gain controller | Expired / Lapsed | 1966-07-05 | 1969-07-29 | 0 | Details |
| US3458688A | Document line position identification for line marking and … | Expired / Lapsed | 1965-08-09 | 1969-07-29 | 0 | Details |
| US3454775A | Information decoding apparatus employing a frequency sensit… | Expired / Lapsed | 1964-12-30 | 1969-07-08 | 0 | Details |
| US3451912A | Schottky-barrier diode formed by sputter-deposition process… | Expired / Lapsed | 1966-07-15 | 1969-06-24 | 0 | Details |
| US3450131A | Blood pressure measuring system with korotkoff sound detect… | Expired / Lapsed | 1967-01-09 | 1969-06-17 | 0 | Details |
| US3450840A | Multiplex data transmission system using orthogonal transmi… | Expired / Lapsed | 1965-11-19 | 1969-06-17 | 0 | Details |
| US3448282A | Optical and gate | Expired / Lapsed | 1968-01-12 | 1969-06-03 | 0 | Details |
| US3447135A | Peripheral data exchange | Expired / Lapsed | 1966-08-18 | 1969-05-27 | 0 | Details |
| US3445822A | Communication arrangement in data processing system | Expired / Lapsed | 1967-07-14 | 1969-05-20 | 0 | Details |
| US3445819A | Multi-system sharing of data processing units | Expired / Lapsed | 1966-08-03 | 1969-05-20 | 0 | Details |
| US3444541A | Tape inter-block gap size control | Expired / Lapsed | 1965-06-21 | 1969-05-13 | 0 | Details |
| US3442683A | Production of metallic coatings upon the surfaces of other … | Expired / Lapsed | 1965-05-13 | 1969-05-06 | 0 | Details |
| US3441912A | Feedback current switch memory cell | Expired / Lapsed | 1966-01-28 | 1969-04-29 | 2 | Details |
| US3440612A | Program mode switching circuit | Expired / Lapsed | 1966-02-28 | 1969-04-22 | 0 | Details |
| US3439331A | Error detection and correction apparatus | Expired / Lapsed | 1965-06-16 | 1969-04-15 | 0 | Details |
| US3437890A | Diffused-epitaxial scanistors | Expired / Lapsed | 1966-11-21 | 1969-04-08 | 0 | Details |
| US3436734A | Error correcting and repairable data processing storage sys… | Expired / Lapsed | 1966-06-21 | 1969-04-01 | 0 | Details |
| US3435418A | Record retrieval and record hold system | Expired / Lapsed | 1965-05-27 | 1969-03-25 | 0 | Details |
| US3434117A | Automatic transmission speed selection control for a data t… | Expired / Lapsed | 1967-04-24 | 1969-03-18 | 0 | Details |
| US3434115A | Timed operation sequence controller | Expired / Lapsed | 1966-07-15 | 1969-03-18 | 0 | Details |
| US3434116A | Scheme for circumventing bad memory cells | Expired / Lapsed | 1966-06-15 | 1969-03-18 | 0 | Details |
| US3432812A | Memory system | Expired / Lapsed | 1966-07-15 | 1969-03-11 | 0 | Details |
| US3432810A | Addressing system for a computer employing a plurality of l… | Expired / Lapsed | 1966-05-31 | 1969-03-11 | 0 | Details |
| US3432813A | Apparatus for control of a plurality of peripheral devices | Expired / Lapsed | 1966-04-19 | 1969-03-11 | 0 | Details |
| US3432815A | Switching logic for a two-dimensional memory | Expired / Lapsed | 1965-02-15 | 1969-03-11 | 0 | Details |
| US3428903A | Multipurpose logic circuit for performing 254 out of 256 di… | Expired / Lapsed | 1965-08-02 | 1969-02-18 | 0 | Details |
| US3427445A | Full adder using field effect transistor of the insulated g… | Expired / Lapsed | 1965-12-27 | 1969-02-11 | 0 | Details |
| US3427472A | Threshold detector employing tunnel diode-hot carrier diode… | Expired / Lapsed | 1965-11-12 | 1969-02-11 | 2 | Details |
| US3427091A | Alteration of transmittance in solids | Expired / Lapsed | 1964-08-14 | 1969-02-11 | 0 | Details |
| US3426332A | Data handling apparatus with recurrent address manipulation… | Expired / Lapsed | 1966-12-15 | 1969-02-04 | 0 | Details |
| US3423749A | Character positioning control | Expired / Lapsed | 1966-03-30 | 1969-01-21 | 0 | Details |
| US3423737A | Nondestructive read transistor memory cell | Expired / Lapsed | 1965-06-21 | 1969-01-21 | 2 | Details |
| US3422402A | Memory systems for using storage devices containing defecti… | Expired / Lapsed | 1965-12-29 | 1969-01-14 | 0 | Details |
| US3422424A | Analog to digital converter | Expired / Lapsed | 1965-01-08 | 1969-01-14 | 0 | Details |
| US3418638A | Instruction processing unit for program branches | Expired / Lapsed | 1966-09-21 | 1968-12-24 | 2 | Details |
| US3417381A | Apparatus for writing information in memory by light | Expired / Lapsed | 1965-06-21 | 1968-12-17 | 2 | Details |
| US3415950A | Video quantizing system | Expired / Lapsed | 1965-03-29 | 1968-12-10 | 2 | Details |
| US3413464A | Method for measuring the nucleic acid in biological cells a… | Expired / Lapsed | 1965-04-29 | 1968-11-26 | 0 | Details |
| US3411143A | Instruction address control by peripheral devices | Expired / Lapsed | 1966-01-13 | 1968-11-12 | 0 | Details |
| US3407781A | Combined indicator and order card form | Expired / Lapsed | 1966-02-04 | 1968-10-29 | 0 | Details |
| US3408458A | Line identifying and marking apparatus | Expired / Lapsed | 1964-12-02 | 1968-10-29 | 0 | Details |
| US3406633A | Collapsible chamber pump | Expired / Lapsed | 1966-11-07 | 1968-10-22 | 0 | Details |
| US3406366A | Electrical temperature sensor device | Expired / Lapsed | 1966-01-13 | 1968-10-15 | 0 | Details |
| US3406040A | Vapor deposition method for forming thin polymeric films | Expired / Lapsed | 1964-06-24 | 1968-10-15 | 0 | Details |
| US3405394A | Controlled register accessing | Expired / Lapsed | 1965-12-22 | 1968-10-08 | 0 | Details |
| US3405258A | Reliability test for computer check circuits | Expired / Lapsed | 1965-04-07 | 1968-10-08 | 0 | Details |
| US3400377A | Character display system | Expired / Lapsed | 1965-10-13 | 1968-09-03 | 0 | Details |
| US3400376A | Information transfer control system | Expired / Lapsed | 1965-09-23 | 1968-09-03 | 0 | Details |
| US3400372A | Terminal for a multi-data processing system | Expired / Lapsed | 1965-02-16 | 1968-09-03 | 0 | Details |
| US3400273A | Two dimensional radiation scanner locating position by the … | Expired / Lapsed | 1964-09-02 | 1968-09-03 | 0 | Details |
| US3400371A | Data processing system | Expired / Lapsed | 1964-04-06 | 1968-09-03 | 0 | Details |
| US3399384A | Variable priority access system | Expired / Lapsed | 1965-09-10 | 1968-08-27 | 0 | Details |
| US3399393A | Two-probe three-gap flux sensitive magnetic head | Expired / Lapsed | 1964-12-07 | 1968-08-27 | 0 | Details |
| US3396372A | Polling system | Expired / Lapsed | 1965-12-29 | 1968-08-06 | 0 | Details |
| US3395392A | Expanded memory system | Expired / Lapsed | 1965-10-22 | 1968-07-30 | 0 | Details |
| US3395391A | Data transmission system and devices | Expired / Lapsed | 1965-08-23 | 1968-07-30 | 0 | Details |
| US3394361A | Incremental magnetic recording and sensing system with twin… | Expired / Lapsed | 1964-04-30 | 1968-07-23 | 0 | Details |
| US3392368A | Ultrasonic and hypersonic sound generator | Expired / Lapsed | 1967-03-15 | 1968-07-09 | 0 | Details |
| US3391394A | Microprogram control for a data processing system | Expired / Lapsed | 1965-10-22 | 1968-07-02 | 0 | Details |
| US3390347A | Sample and hold circuit | Expired / Lapsed | 1966-01-10 | 1968-06-25 | 2 | Details |
| US3389023A | Methods of making a narrow emitter transistor by masking an… | Expired / Lapsed | 1966-01-14 | 1968-06-18 | 0 | Details |
| US3387283A | Addressing system | Expired / Lapsed | 1966-02-07 | 1968-06-04 | 2 | Details |
| US3387282A | Input for digital controller | Expired / Lapsed | 1966-01-17 | 1968-06-04 | 2 | Details |
| US3387222A | Adaptive threshold signal detector with noise suppression | Expired / Lapsed | 1965-07-01 | 1968-06-04 | 2 | Details |
| US3386865A | Process of making planar semiconductor devices isolated by … | Expired / Lapsed | 1965-05-10 | 1968-06-04 | 2 | Details |
| US3387262A | Diagnostic system | Expired / Lapsed | 1965-01-12 | 1968-06-04 | 0 | Details |
| US3387272A | Content addressable memory system using address transformat… | Expired / Lapsed | 1964-12-23 | 1968-06-04 | 0 | Details |
| US3386083A | Interruptions in a large scale data processing system | Expired / Lapsed | 1967-01-13 | 1968-05-28 | 0 | Details |
| US3386082A | Configuration control in multiprocessors | Expired / Lapsed | 1965-06-02 | 1968-05-28 | 0 | Details |
| US3384875A | Reference selection apparatus for cross correlation | Expired / Lapsed | 1965-09-27 | 1968-05-21 | 0 | Details |
| US3382963A | Printing apparatus with no-print feature | Expired / Lapsed | 1966-08-17 | 1968-05-14 | 0 | Details |
| US3383657A | Personnel security system having personally carried card wi… | Expired / Lapsed | 1965-05-28 | 1968-05-14 | 0 | Details |
| US3380030A | Apparatus for mating different word length memories | Expired / Lapsed | 1965-07-29 | 1968-04-23 | 0 | Details |
| US3380025A | Microprogrammed addressing control system for a digital com… | Expired / Lapsed | 1964-12-04 | 1968-04-23 | 0 | Details |
| US3377579A | Plural channel priority control | Expired / Lapsed | 1967-01-13 | 1968-04-09 | 0 | Details |
| US3377624A | Memory protection system | Expired / Lapsed | 1966-01-07 | 1968-04-09 | 2 | Details |
| US3377619A | Data multiplexing system | Expired / Lapsed | 1964-04-06 | 1968-04-09 | 2 | Details |
| US3374472A | Storage cancellation and panel data key fetching in a data … | Expired / Lapsed | 1967-01-13 | 1968-03-19 | 0 | Details |
| US3374470A | Adaptive threshold circuits | Expired / Lapsed | 1965-10-19 | 1968-03-19 | 2 | Details |
| US3374466A | Data processing system | Expired / Lapsed | 1965-05-10 | 1968-03-19 | 0 | Details |
| US3374410A | Stepping motor positioning system including acceleration an… | Expired / Lapsed | 1965-01-06 | 1968-03-19 | 0 | Details |
| US3374461A | Physiological monitoring system | Expired / Lapsed | 1964-02-25 | 1968-03-19 | 0 | Details |
| US3372378A | Input/output unit switch | Expired / Lapsed | 1964-04-27 | 1968-03-05 | 0 | Details |
| US3370347A | Method of making superconductor wires | Expired / Lapsed | 1966-05-26 | 1968-02-27 | 2 | Details |
| US3371321A | Tutorial system | Expired / Lapsed | 1965-04-15 | 1968-02-27 | 0 | Details |
| US3370973A | Activation of glass for electroless metal deposition of uni… | Expired / Lapsed | 1964-12-28 | 1968-02-27 | 2 | Details |
| US3369990A | Cathodic sputtering apparatus including thermionic means fo… | Expired / Lapsed | 1964-12-31 | 1968-02-20 | 2 | Details |
| US3368207A | File protection to i/o storage | Expired / Lapsed | 1965-05-12 | 1968-02-06 | 0 | Details |
| US3366916A | Connector with fluid pressure relief devices | Expired / Lapsed | 1966-07-15 | 1968-01-30 | 1 | Details |
| US3366930A | Method and apparatus for rejecting noise in a data transmis… | Expired / Lapsed | 1965-03-01 | 1968-01-30 | 2 | Details |
| US3366929A | Computing system embodying flexible subroutine capabilities | Expired / Lapsed | 1964-12-30 | 1968-01-30 | 0 | Details |
| US3366927A | Computing techniques | Expired / Lapsed | 1964-06-17 | 1968-01-30 | 2 | Details |
| US3365583A | Electric field-responsive solid state devices | Expired / Lapsed | 1964-06-12 | 1968-01-23 | 2 | Details |
| US3363333A | Teaching machine | Expired / Lapsed | 1965-09-24 | 1968-01-16 | 0 | Details |
| US3364468A | Cryogenic fault or error-detecting and correcting system ha… | Expired / Lapsed | 1959-12-30 | 1968-01-16 | 2 | Details |
| US3364467A | Cryogenic fault or error-detection and correction device ha… | Expired / Lapsed | 1959-12-30 | 1968-01-16 | 2 | Details |
| US3362015A | Communication switching adapter | Expired / Lapsed | 1964-06-30 | 1968-01-02 | 0 | Details |
| US3359543A | Data transmission system | Expired / Lapsed | 1965-07-02 | 1967-12-19 | 2 | Details |
| US3358271A | Adaptive logic system for arbitrary functions | Expired / Lapsed | 1964-12-24 | 1967-12-12 | 2 | Details |
| US3357003A | Single channel quaternary magnetic recording system | Expired / Lapsed | 1964-12-28 | 1967-12-05 | 1 | Details |
| US3354430A | Memory control matrix | Expired / Lapsed | 1965-06-30 | 1967-11-21 | 2 | Details |
| US3354440A | Nondestructive memory array | Expired / Lapsed | 1965-04-19 | 1967-11-21 | 2 | Details |
| US3354450A | Data translation apparatus | Expired / Lapsed | 1964-06-23 | 1967-11-21 | 2 | Details |
| US3353894A | Electro-optic light deflector utilizing total internal refl… | Expired / Lapsed | 1964-06-08 | 1967-11-21 | 1 | Details |
| US3354405A | Energy coupling device | Expired / Lapsed | 1962-08-24 | 1967-11-21 | 2 | Details |
| US3353162A | Communication line priority servicing apparatus | Expired / Lapsed | 1965-06-29 | 1967-11-14 | 2 | Details |
| US3353160A | Tree priority circuit | Expired / Lapsed | 1965-06-09 | 1967-11-14 | 2 | Details |
| US3353157A | Generator for variable and repetitive sequences of digital … | Expired / Lapsed | 1964-09-28 | 1967-11-14 | 2 | Details |
| US3350695A | Information retrieval system and method | Expired / Lapsed | 1964-12-08 | 1967-10-31 | 2 | Details |
| US3350690A | Automatic data correction for batchfabricated memories | Expired / Lapsed | 1964-02-25 | 1967-10-31 | 2 | Details |
| US3349375A | Associative logic for highly parallel computer and data pro… | Expired / Lapsed | 1963-11-07 | 1967-10-24 | 2 | Details |
| US3348214A | Adaptive sequential logic network | Expired / Lapsed | 1965-06-28 | 1967-10-17 | 2 | Details |
| US3345912A | Rotary shearing interferometer | Expired / Lapsed | 1964-03-10 | 1967-10-10 | 2 | Details |
| US3344410A | Data handling system | Expired / Lapsed | 1965-04-28 | 1967-09-26 | 2 | Details |
| US3344406A | Sampled data reduction and storage system | Expired / Lapsed | 1964-11-09 | 1967-09-26 | 2 | Details |
| US3343141A | Bypassing of processor sequence controls for diagnostic tes… | Expired / Lapsed | 1964-12-23 | 1967-09-19 | 2 | Details |
| US3343135A | Compiling circuitry for a highly-parallel computing system | Expired / Lapsed | 1964-08-13 | 1967-09-19 | 2 | Details |
| US3341442A | Method of cathode sputtering including cleaning by ion bomb… | Expired / Lapsed | 1966-08-22 | 1967-09-12 | 2 | Details |
| US3341818A | Plural line scanner | Expired / Lapsed | 1964-06-30 | 1967-09-12 | 2 | Details |
| US3340388A | Latched carry save adder circuit for multipliers | Expired / Lapsed | 1965-07-12 | 1967-09-05 | 2 | Details |
| US3339179A | Pattern recognition preprocessing techniques | Expired / Lapsed | 1966-02-23 | 1967-08-29 | 2 | Details |
| US3339073A | Sonic laser modulator with mode suppression produced by ext… | Expired / Lapsed | 1962-12-31 | 1967-08-29 | 2 | Details |
| US3337855A | Transmission control unit | Expired / Lapsed | 1964-06-30 | 1967-08-22 | 2 | Details |
| US3337766A | Selective beam positioning of a flying spot scanner with er… | Expired / Lapsed | 1964-04-16 | 1967-08-22 | 2 | Details |
| US3337365A | Electrical resistance composition and method of using the s… | Expired / Lapsed | 1963-03-25 | 1967-08-22 | 2 | Details |
| US3336582A | Interlocked communication system | Expired / Lapsed | 1964-09-01 | 1967-08-15 | 2 | Details |
| US3336467A | Simultaneous message framing and error detection | Expired / Lapsed | 1963-11-29 | 1967-08-15 | 2 | Details |
| US3334304A | Asynchronous character generator for successive endpoint de… | Expired / Lapsed | 1965-03-01 | 1967-08-01 | 0 | Details |
| US3333251A | File storage system | Expired / Lapsed | 1964-11-13 | 1967-07-25 | 2 | Details |
| US3333246A | Delay line clock | Expired / Lapsed | 1964-07-08 | 1967-07-25 | 2 | Details |
| US3333249A | Adaptive logic system with random selection, for conditioni… | Expired / Lapsed | 1964-06-29 | 1967-07-25 | 2 | Details |
| US3333146A | Opto-electronic device | Expired / Lapsed | 1964-06-29 | 1967-07-25 | 2 | Details |
| US3333248A | Self-adaptive systems | Expired / Lapsed | 1963-12-20 | 1967-07-25 | 2 | Details |
| US3331061A | Drive-sense arrangement for data storage unit | Expired / Lapsed | 1963-11-27 | 1967-07-11 | 1 | Details |
| US3331053A | Format control for disk recording | Expired / Lapsed | 1963-10-01 | 1967-07-11 | 2 | Details |
| US3328195A | Magnetic recording medium with two storage layers for recor… | Expired / Lapsed | 1966-06-24 | 1967-06-27 | 2 | Details |
| US3328772A | Data queuing system with use of recirculating delay line | Expired / Lapsed | 1964-12-23 | 1967-06-27 | 2 | Details |
| US3328523A | Scanning apparatus | Expired / Lapsed | 1964-07-24 | 1967-06-27 | 2 | Details |
| US3328770A | Address register | Expired / Lapsed | 1964-06-26 | 1967-06-27 | 2 | Details |
| US3328768A | Storage protection systems | Expired / Lapsed | 1964-04-06 | 1967-06-27 | 1 | Details |
| US3327119A | Method and apparatus for detecting cancer cells | Expired / Lapsed | 1964-03-26 | 1967-06-20 | 2 | Details |
| US3327117A | Cancer cell detector using two wavelengths for comparison | Expired / Lapsed | 1963-08-12 | 1967-06-20 | 2 | Details |
| US3327131A | Current control system | Expired / Lapsed | 1961-12-29 | 1967-06-20 | 2 | Details |
| US3325788A | Extrinsically variable microprogram controls | Expired / Lapsed | 1964-12-21 | 1967-06-13 | 2 | Details |
| US3323119A | Display system for a data processing unit | Expired / Lapsed | 1963-12-30 | 1967-05-30 | 2 | Details |
| US3323108A | Symbolic addressing | Expired / Lapsed | 1963-06-12 | 1967-05-30 | 2 | Details |
| US3319317A | Method of making a multilayered laminated circuit board | Expired / Lapsed | 1963-12-23 | 1967-05-16 | 0 | Details |
| US3319230A | Data processing machine including program interrupt feature | Expired / Lapsed | 1965-01-05 | 1967-05-09 | 2 | Details |
| US3317902A | Address selection control apparatus | Expired / Lapsed | 1964-04-06 | 1967-05-02 | 2 | Details |
| US3317901A | Adaptive logic system with inputs applied randomly only dur… | Expired / Lapsed | 1964-02-05 | 1967-05-02 | 2 | Details |
| US3317848A | Non-reciprocal light amplifier | Expired / Lapsed | 1964-01-20 | 1967-05-02 | 2 | Details |
| US3317900A | Adaptive logic system | Expired / Lapsed | 1963-12-23 | 1967-05-02 | 1 | Details |
| US3317899A | Information processing system utilizing a key to address tr… | Expired / Lapsed | 1963-10-23 | 1967-05-02 | 2 | Details |
| US3317898A | Memory system | Expired / Lapsed | 1963-07-19 | 1967-05-02 | 2 | Details |
| US3317733A | Radiation scanner employing rectifying devices and photocon… | Expired / Lapsed | 1963-05-10 | 1967-05-02 | 2 | Details |
| US3315235A | Data processing system | Expired / Lapsed | 1964-08-04 | 1967-04-18 | 2 | Details |
| US3315229A | Blood cell recognizer | Expired / Lapsed | 1963-12-31 | 1967-04-18 | 2 | Details |
| US3315233A | Self-addressing and self-assigning memory system | Expired / Lapsed | 1963-10-01 | 1967-04-18 | 2 | Details |
| US3314052A | Light modulation system | Expired / Lapsed | 1963-04-12 | 1967-04-11 | 2 | Details |
| US3312948A | Record format control circuit | Expired / Lapsed | 1964-03-25 | 1967-04-04 | 2 | Details |
| US3312946A | Processor for coded data | Expired / Lapsed | 1963-12-18 | 1967-04-04 | 2 | Details |
| US3312881A | Transistor with limited area basecollector junction | Expired / Lapsed | 1963-11-08 | 1967-04-04 | 2 | Details |
| US3311842A | Digital transducer with condition responsive shock excited … | Expired / Lapsed | 1965-01-19 | 1967-03-28 | 1 | Details |
| US3311896A | Data shifting apparatus | Expired / Lapsed | 1964-04-03 | 1967-03-28 | 2 | Details |
| US3311895A | Adaptive logic system with artificial weighting of output s… | Expired / Lapsed | 1963-12-30 | 1967-03-28 | 2 | Details |
| US3311891A | Recirculating memory device with gated inputs | Expired / Lapsed | 1963-08-21 | 1967-03-28 | 2 | Details |
| US3311887A | File memory system with key to address transformation appar… | Expired / Lapsed | 1963-04-12 | 1967-03-28 | 2 | Details |
| US3311739A | Accumulative multiplier | Expired / Lapsed | 1963-01-10 | 1967-03-28 | 2 | Details |
| US3310780A | Character assembly and distribution apparatus | Expired / Lapsed | 1962-10-15 | 1967-03-21 | 2 | Details |
| US3304544A | Random access magnetic memory unit housing | Expired / Lapsed | 1962-12-27 | 1967-02-14 | 2 | Details |
| US3303476A | Input/output control | Expired / Lapsed | 1964-04-06 | 1967-02-07 | 2 | Details |
| US3303475A | Control system | Expired / Lapsed | 1963-11-29 | 1967-02-07 | 2 | Details |
| US3303473A | Adaptive logic circuits | Expired / Lapsed | 1963-10-28 | 1967-02-07 | 2 | Details |
| US3302186A | Information retrieval system | Expired / Lapsed | 1964-08-17 | 1967-01-31 | 2 | Details |
| US3302170A | Traffic light control buffer | Expired / Lapsed | 1964-04-28 | 1967-01-31 | 2 | Details |
| US3302109A | Apparatus and method for testing logic circuits and the lik… | Expired / Lapsed | 1962-12-12 | 1967-01-31 | 2 | Details |
| US3302176A | Message routing system | Expired / Lapsed | 1962-12-07 | 1967-01-31 | 2 | Details |
| US3300763A | Message exchange system utilizing time multiplexing and a p… | Expired / Lapsed | 1963-08-20 | 1967-01-24 | 2 | Details |
| US3300339A | Method of covering the surfaces of objects with protective … | Expired / Lapsed | 1962-12-31 | 1967-01-24 | 1 | Details |
| US3299410A | Data filing system | Expired / Lapsed | 1964-03-25 | 1967-01-17 | 2 | Details |
| US3299261A | Multiple-input memory accessing apparatus | Expired / Lapsed | 1963-12-16 | 1967-01-17 | 2 | Details |
| US3299210A | Apparatus for connecting a multichannel data processor with… | Expired / Lapsed | 1963-03-18 | 1967-01-17 | 4 | Details |
| US3297465A | Method for producing organic plasma and for depositing poly… | Expired / Lapsed | 1963-12-31 | 1967-01-10 | 2 | Details |
| US3297993A | Apparatus for generating information regarding the spatial … | Expired / Lapsed | 1963-12-19 | 1967-01-10 | 1 | Details |
| US3293092A | Semiconductor device fabrication | Expired / Lapsed | 1964-03-17 | 1966-12-20 | 2 | Details |
| US3293652A | Selective piercing of sheet material | Expired / Lapsed | 1964-02-20 | 1966-12-20 | 1 | Details |
| US3293616A | Computer instruction sequencing and control system | Expired / Lapsed | 1963-07-03 | 1966-12-20 | 2 | Details |
| US3293615A | Current addressing system | Expired / Lapsed | 1963-06-03 | 1966-12-20 | 2 | Details |
| US3292151A | Memory expansion | Expired / Lapsed | 1962-06-04 | 1966-12-13 | 2 | Details |
| US3290671A | Byte decoder | Expired / Lapsed | 1963-04-29 | 1966-12-06 | 2 | Details |
| US3289175A | Computer data storage system | Expired / Lapsed | 1963-05-23 | 1966-11-29 | 2 | Details |
| US3286240A | Channel status checking and switching system | Expired / Lapsed | 1962-12-31 | 1966-11-15 | 1 | Details |
| US3284780A | Adaptive logic system | Expired / Lapsed | 1963-12-19 | 1966-11-08 | 4 | Details |
| US3283124A | Selective heating apparatus | Expired / Lapsed | 1965-05-07 | 1966-11-01 | 2 | Details |
| US3282816A | Process of cathode sputtering from a cylindrical cathode | Expired / Lapsed | 1963-09-16 | 1966-11-01 | 2 | Details |
| US3282815A | Magnetic control of film deposition | Expired / Lapsed | 1963-07-01 | 1966-11-01 | 2 | Details |
| US3281793A | Selective modification of sequentially scanned control word… | Expired / Lapsed | 1962-10-15 | 1966-10-25 | 2 | Details |
| US3280312A | System for measuring kiln conditions using thermocouples in… | Expired / Lapsed | 1962-12-11 | 1966-10-18 | 2 | Details |
| US3278732A | High speed multiplier circuit | Expired / Lapsed | 1963-10-29 | 1966-10-11 | 1 | Details |
| US3278685A | Wave analyzing system | Expired / Lapsed | 1962-12-31 | 1966-10-11 | 2 | Details |
| US3277447A | Electronic digital computers | Expired / Lapsed | 1964-03-18 | 1966-10-04 | 2 | Details |
| US3274560A | Message handling system | Expired / Lapsed | 1962-09-12 | 1966-09-20 | 2 | Details |
| US3274556A | Large scale shifter | Expired / Lapsed | 1962-07-10 | 1966-09-20 | 2 | Details |
| US3273131A | Queue reducing memory | Expired / Lapsed | 1963-12-31 | 1966-09-13 | 2 | Details |
| US3273130A | Applied sequence identification device | Expired / Lapsed | 1963-12-04 | 1966-09-13 | 2 | Details |
| US3273129A | Computer data storage and handling system having means for … | Expired / Lapsed | 1963-07-05 | 1966-09-13 | 2 | Details |
| US3273126A | Computer control system | Expired / Lapsed | 1961-08-25 | 1966-09-13 | 2 | Details |
| US3271751A | Magnetic thin film transducer | Expired / Lapsed | 1962-12-03 | 1966-09-06 | 2 | Details |
| US3270325A | Parallel memory, multiple processing, variable word length … | Expired / Lapsed | 1963-12-23 | 1966-08-30 | 2 | Details |
| US3268875A | Translation operation | Expired / Lapsed | 1963-12-20 | 1966-08-23 | 2 | Details |
| US3268816A | Adaptive communications system incorporating receiver selec… | Expired / Lapsed | 1963-11-22 | 1966-08-23 | 2 | Details |
| US3267431A | Adaptive computing system capable of being trained to recog… | Expired / Lapsed | 1963-04-29 | 1966-08-16 | 2 | Details |
| US3267439A | Pattern recognition and prediction system | Expired / Lapsed | 1963-04-26 | 1966-08-16 | 2 | Details |
| US3266024A | Synchronizing apparatus | Expired / Lapsed | 1962-05-31 | 1966-08-09 | 2 | Details |
| US3264611A | Optical multiplexing | Expired / Lapsed | 1964-03-09 | 1966-08-02 | 1 | Details |
| US3264615A | Memory protection system | Expired / Lapsed | 1962-12-11 | 1966-08-02 | 2 | Details |
| US3263216A | Pattern recognition error correction system employing varia… | Expired / Lapsed | 1964-03-20 | 1966-07-26 | 2 | Details |
| US3262122A | Thermoplastic memory | Expired / Lapsed | 1963-05-01 | 1966-07-19 | 2 | Details |
| US3261916A | Adjustable recognition system | Expired / Lapsed | 1962-11-16 | 1966-07-19 | 2 | Details |
| US3262059A | Amplifier or generator of optical-mode waves in solids | Expired / Lapsed | 1962-08-29 | 1966-07-19 | 2 | Details |
| US3256516A | Data display centering and expansion system | Expired / Lapsed | 1962-06-20 | 1966-06-14 | 2 | Details |
| US3255033A | Electroless plating of a substrate with nickel-iron alloys … | Expired / Lapsed | 1961-12-28 | 1966-06-07 | 2 | Details |
| US3253265A | Associative memory ordered retrieval | Expired / Lapsed | 1961-12-29 | 1966-05-24 | 2 | Details |
| US3253264A | Associative memory ordered retrieval | Expired / Lapsed | 1961-12-29 | 1966-05-24 | 1 | Details |
| US3253131A | Adder | Expired / Lapsed | 1961-06-30 | 1966-05-24 | 2 | Details |
| US3253263A | Code to voice inquiry system and twospeed multi-unit buffer… | Expired / Lapsed | 1961-04-10 | 1966-05-24 | 2 | Details |
| US3252004A | Multistate memory circuit | Expired / Lapsed | 1962-11-28 | 1966-05-17 | 1 | Details |
| US3252098A | Waveform shaping circuit | Expired / Lapsed | 1961-11-20 | 1966-05-17 | 2 | Details |
| US3250694A | Apparatus for coating articles by cathode sputtering | Expired / Lapsed | 1962-10-17 | 1966-05-10 | 4 | Details |
| US3249924A | Asynchronous data processing system | Expired / Lapsed | 1962-12-31 | 1966-05-03 | 2 | Details |
| US3249921A | Associative memory ordered retrieval | Expired / Lapsed | 1961-12-29 | 1966-05-03 | 2 | Details |
| US3249920A | Program control element | Expired / Lapsed | 1960-06-30 | 1966-05-03 | 2 | Details |
| US3248697A | Error classification and correction system | Expired / Lapsed | 1962-11-27 | 1966-04-26 | 1 | Details |
| US3248669A | Semiconductor laser with optical cavity | Expired / Lapsed | 1962-10-30 | 1966-04-26 | 0 | Details |
| US3248708A | Memory organization for fast read storage | Expired / Lapsed | 1962-01-22 | 1966-04-26 | 2 | Details |
| US3248677A | Temperature compensated semiconductor resistor | Expired / Lapsed | 1961-10-27 | 1966-04-26 | 2 | Details |
| US3248705A | Automatic editor | Expired / Lapsed | 1961-06-30 | 1966-04-26 | 2 | Details |
| US3248702A | Electronic digital computing machines | Expired / Lapsed | 1961-03-13 | 1966-04-26 | 2 | Details |
| US3248030A | Moving record control | Expired / Lapsed | 1961-01-18 | 1966-04-26 | 0 | Details |
| US3248701A | Data transfer control system | Expired / Lapsed | 1960-12-30 | 1966-04-26 | 2 | Details |
| US3247489A | Memory device including function performing means | Expired / Lapsed | 1961-08-31 | 1966-04-19 | 2 | Details |
| US3244369A | Input-output conversion apparatus | Expired / Lapsed | 1964-09-25 | 1966-04-05 | 2 | Details |
| US3244986A | Detection of bi-phase digital signals | Expired / Lapsed | 1962-10-08 | 1966-04-05 | 2 | Details |
| US3245047A | Selective data transfer apparatus | Expired / Lapsed | 1962-09-19 | 1966-04-05 | 2 | Details |
| US3245045A | Integrated data processing system | Expired / Lapsed | 1961-11-21 | 1966-04-05 | 2 | Details |
| US3245044A | Automatic program suspension system | Expired / Lapsed | 1961-11-16 | 1966-04-05 | 1 | Details |
| US3245043A | Message communication systems with interstation information… | Expired / Lapsed | 1961-11-10 | 1966-04-05 | 2 | Details |
| US3245038A | Central to remote communication system with address modific… | Expired / Lapsed | 1961-06-30 | 1966-04-05 | 2 | Details |
| US3244805A | Counter controlled remote station transmission to central d… | Expired / Lapsed | 1961-06-29 | 1966-04-05 | 2 | Details |
| US3245042A | Computer indexing apparatus | Expired / Lapsed | 1960-10-26 | 1966-04-05 | 2 | Details |
| US3242467A | Temporary storage register | Expired / Lapsed | 1960-06-07 | 1966-03-22 | 2 | Details |
| US3241015A | Positional servo system | Expired / Lapsed | 1961-12-26 | 1966-03-15 | 2 | Details |
| US3239811A | Weighting and decision circuit for use in specimen recognit… | Expired / Lapsed | 1962-07-11 | 1966-03-08 | 1 | Details |
| US3239823A | Twin gap flux responsive head | Expired / Lapsed | 1962-05-16 | 1966-03-08 | 2 | Details |
| US3239818A | Memory system | Expired / Lapsed | 1961-12-28 | 1966-03-08 | 2 | Details |
| US3238508A | Logical manipulator | Expired / Lapsed | 1961-12-18 | 1966-03-01 | 2 | Details |
| US3238377A | Cryogenic m out of n logic circuits | Expired / Lapsed | 1961-12-04 | 1966-03-01 | 2 | Details |
| US3238506A | Computer multiplexing apparatus | Expired / Lapsed | 1961-06-27 | 1966-03-01 | 2 | Details |
| US3237025A | Comparator circuit | Expired / Lapsed | 1962-12-28 | 1966-02-22 | 2 | Details |
| US3237157A | Apparatus for detecting and localizing malfunctions in elec… | Expired / Lapsed | 1960-12-30 | 1966-02-22 | 2 | Details |
| US3235842A | Serially connected inhibitor logic stages with means for by… | Expired / Lapsed | 1960-07-29 | 1966-02-15 | 2 | Details |
| US3234524A | Push-down memory | Expired / Lapsed | 1962-05-28 | 1966-02-08 | 2 | Details |
| US3234522A | Inference unit | Expired / Lapsed | 1961-12-20 | 1966-02-08 | 2 | Details |
| US3234057A | Semiconductor heterojunction device | Expired / Lapsed | 1961-06-23 | 1966-02-08 | 2 | Details |
| US3234392A | Photosensitive pattern recognition systems | Expired / Lapsed | 1961-05-26 | 1966-02-08 | 1 | Details |
| US3231863A | Memory bus control unit | Expired / Lapsed | 1960-12-30 | 1966-01-25 | 2 | Details |
| US3231862A | Memory bus control unit | Expired / Lapsed | 1960-12-30 | 1966-01-25 | 2 | Details |
| US3230509A | Multiple circuit data transmission control | Expired / Lapsed | 1962-06-11 | 1966-01-18 | 2 | Details |
| US3230513A | Memory addressing system | Expired / Lapsed | 1960-12-30 | 1966-01-18 | 2 | Details |
| US3230512A | Memory system | Expired / Lapsed | 1959-08-28 | 1966-01-18 | 2 | Details |
| US3229209A | Vestigial sideband transmission system | Expired / Lapsed | 1962-12-18 | 1966-01-11 | 2 | Details |
| US3229078A | Code converter | Expired / Lapsed | 1962-06-29 | 1966-01-11 | 2 | Details |
| US3229260A | Multiprocessing computer system | Expired / Lapsed | 1962-03-02 | 1966-01-11 | 2 | Details |
| US3229259A | Multiple rate data system | Expired / Lapsed | 1962-02-01 | 1966-01-11 | 2 | Details |
| US3229272A | Analog to digital time base encoder | Expired / Lapsed | 1961-12-29 | 1966-01-11 | 2 | Details |
| US3229255A | Memory system | Expired / Lapsed | 1959-12-10 | 1966-01-11 | 2 | Details |
| US3229253A | Matrix for reading out stored data | Expired / Lapsed | 1959-03-30 | 1966-01-11 | 2 | Details |
| US3227865A | Residue checking system | Expired / Lapsed | 1962-06-29 | 1966-01-04 | 1 | Details |
| US3228002A | Parallel input extreme signal indicator having a control im… | Expired / Lapsed | 1961-02-02 | 1966-01-04 | 2 | Details |
| US3228005A | Apparatus for manipulating data on a byte basis | Expired / Lapsed | 1960-12-30 | 1966-01-04 | 2 | Details |
| US3226534A | Superconductive adder and correlator | Expired / Lapsed | 1961-12-07 | 1965-12-28 | 1 | Details |
| US3226684A | Computer control apparatus | Expired / Lapsed | 1960-12-29 | 1965-12-28 | 2 | Details |
| US3226683A | Sequential decision making device | Expired / Lapsed | 1960-10-19 | 1965-12-28 | 2 | Details |
| US3225333A | Differential quantitized storage and compression | Expired / Lapsed | 1961-12-28 | 1965-12-21 | 2 | Details |
| US3223925A | Digital data modulation device | Expired / Lapsed | 1962-01-29 | 1965-12-14 | 1 | Details |
| US3222638A | Specimen identification apparatus utilizing optical autocor… | Expired / Lapsed | 1961-12-04 | 1965-12-07 | 2 | Details |
| US3222653A | Memory system for using a memory despite the presence of de… | Expired / Lapsed | 1961-09-18 | 1965-12-07 | 2 | Details |
| US3222643A | Error detecting and correcting systems | Expired / Lapsed | 1961-06-22 | 1965-12-07 | 1 | Details |
| US3222650A | Interpretation machine | Expired / Lapsed | 1960-12-30 | 1965-12-07 | 1 | Details |
| US3221158A | Combinatorial word analyzer | Expired / Lapsed | 1961-06-28 | 1965-11-30 | 2 | Details |
| US3221308A | Memory system | Expired / Lapsed | 1960-12-30 | 1965-11-30 | 2 | Details |
| US3220013A | High speed electro-optic printer | Expired / Lapsed | 1963-10-21 | 1965-11-23 | 2 | Details |
| US3219980A | Computer multiplexing apparatus | Expired / Lapsed | 1960-06-30 | 1965-11-23 | 2 | Details |
| US3218611A | Data transfer control device | Expired / Lapsed | 1961-04-18 | 1965-11-16 | 2 | Details |
| US3217298A | Electronic digital computing machines | Expired / Lapsed | 1961-04-18 | 1965-11-09 | 2 | Details |
| US3216003A | Conversion system | Expired / Lapsed | 1961-06-06 | 1965-11-02 | 2 | Details |
| US3212918A | Electroless plating process | Expired / Lapsed | 1962-05-28 | 1965-10-19 | 2 | Details |
| US3212929A | Method of forming a glass film on an object | Expired / Lapsed | 1962-03-22 | 1965-10-19 | 2 | Details |
| US3213370A | Signal selecting system with switching at the interstice be… | Expired / Lapsed | 1961-03-13 | 1965-10-19 | 2 | Details |
| US3210729A | Data display system | Expired / Lapsed | 1961-12-18 | 1965-10-05 | 0 | Details |
| US3209328A | Adaptive recognition system for recognizing similar patterns | Expired / Lapsed | 1963-02-28 | 1965-09-28 | 1 | Details |
| US3208342A | Electro-optic light coupling of optical fibers | Expired / Lapsed | 1962-09-18 | 1965-09-28 | 2 | Details |
| US3208057A | Format control for disk recording | Expired / Lapsed | 1961-12-26 | 1965-09-21 | 2 | Details |
| US3208049A | Synchronous transmitter-receiver | Expired / Lapsed | 1960-08-25 | 1965-09-21 | 0 | Details |
| US3205488A | Cathode ray tube having resistor deflection control | Expired / Lapsed | 1962-04-24 | 1965-09-07 | 2 | Details |
| US3202834A | Frequency discriminating circuit | Expired / Lapsed | 1961-10-13 | 1965-08-24 | 1 | Details |
| US3202964A | Cryogenic memory system | Expired / Lapsed | 1960-10-25 | 1965-08-24 | 2 | Details |
| US3202969A | Electronic calculator | Expired / Lapsed | 1959-12-30 | 1965-08-24 | 1 | Details |
| US3201759A | Data input device | Expired / Lapsed | 1959-12-30 | 1965-08-17 | 2 | Details |
| US3199099A | Multi-stage binary-coded-decimal to decimal conversion mean… | Expired / Lapsed | 1962-02-09 | 1965-08-03 | 2 | Details |
| US3199082A | Memory system | Expired / Lapsed | 1959-11-27 | 1965-08-03 | 2 | Details |
| US3197740A | Data storage and processing machine | Expired / Lapsed | 1958-08-29 | 1965-07-27 | 2 | Details |
| US3197739A | Magnetic recording system | Expired / Lapsed | 1958-06-30 | 1965-07-27 | 2 | Details |
| US3196399A | Specimen identification techniques employing selected funct… | Expired / Lapsed | 1962-10-01 | 1965-07-20 | 2 | Details |
| US3196398A | Pattern recognition preprocessing techniques | Expired / Lapsed | 1962-05-21 | 1965-07-20 | 1 | Details |
| US3196260A | Adder | Expired / Lapsed | 1961-05-03 | 1965-07-20 | 1 | Details |
| US3196284A | Logical signal processing apparatus | Expired / Lapsed | 1961-04-21 | 1965-07-20 | 1 | Details |
| US3196394A | Specimen identification techniques employing non-linear fun… | Expired / Lapsed | 1961-03-03 | 1965-07-20 | 2 | Details |
| US3196258A | Counter step checking | Expired / Lapsed | 1960-06-02 | 1965-07-20 | 2 | Details |
| US3195118A | Data storage timing system | Expired / Lapsed | 1961-08-24 | 1965-07-13 | 2 | Details |
| US3192363A | Binary multipler for skipping a string of zeroes or ones | Expired / Lapsed | 1961-05-24 | 1965-06-29 | 2 | Details |
| US3191150A | Specimen identification system with adaptive and non-adapti… | Expired / Lapsed | 1962-10-30 | 1965-06-22 | 2 | Details |
| US3191149A | Specimen identification apparatus with means for altering s… | Expired / Lapsed | 1962-01-15 | 1965-06-22 | 2 | Details |
| US3191155A | Logical circuits and memory | Expired / Lapsed | 1960-08-22 | 1965-06-22 | 2 | Details |
| US3188455A | Integrating means | Expired / Lapsed | 1960-12-29 | 1965-06-08 | 2 | Details |
| US3185966A | Data editing system | Expired / Lapsed | 1962-05-04 | 1965-05-25 | 2 | Details |
| US3185967A | Two dimensional selection system for read only memory | Expired / Lapsed | 1962-02-23 | 1965-05-25 | 0 | Details |
| US3185824A | Adaptive data compactor | Expired / Lapsed | 1961-10-24 | 1965-05-25 | 1 | Details |
| US3185823A | Data compactor | Expired / Lapsed | 1961-10-24 | 1965-05-25 | 1 | Details |
| US3185850A | Photosensitive two state circuits and systems | Expired / Lapsed | 1961-06-29 | 1965-05-25 | 1 | Details |
| US3183303A | System for voice answer-back from data processor | Expired / Lapsed | 1961-12-21 | 1965-05-11 | 0 | Details |
| US3183518A | Record perforating apparatus | Expired / Lapsed | 1961-12-04 | 1965-05-11 | 2 | Details |
| US3183410A | Magnetic multipositioning actuators | Expired / Lapsed | 1960-12-30 | 1965-05-11 | 1 | Details |
| US3181046A | Gated pulse amplifier servomechanism | Expired / Lapsed | 1962-07-02 | 1965-04-27 | 2 | Details |
| US3176279A | Data storage apparatus | Expired / Lapsed | 1959-02-09 | 1965-03-30 | 2 | Details |
| US3173878A | Process of making microcapsules | Expired / Lapsed | 1960-02-26 | 1965-03-16 | 2 | Details |
| US3172083A | Electrolytic memory | Expired / Lapsed | 1962-01-12 | 1965-03-02 | 1 | Details |
| US3171761A | Particular masking configuration in a vapor deposition proc… | Expired / Lapsed | 1961-10-06 | 1965-03-02 | 2 | Details |
| US3170071A | Error correction device utilizing spare substitution | Expired / Lapsed | 1960-03-30 | 1965-02-16 | 2 | Details |
| US3170142A | Data processing machine | Expired / Lapsed | 1956-09-26 | 1965-02-16 | 2 | Details |
| US3167740A | Data comparison system utilizing a universal character | Expired / Lapsed | 1961-04-12 | 1965-01-26 | 2 | Details |
| US3167646A | Apparatus for processing data including an instruction and … | Expired / Lapsed | 1961-03-31 | 1965-01-26 | 2 | Details |
| US3166737A | Asynchronous data processor | Expired / Lapsed | 1960-12-23 | 1965-01-19 | 2 | Details |
| US3166668A | Computer program system | Expired / Lapsed | 1960-03-24 | 1965-01-19 | 1 | Details |
| US3163850A | Record scatter variable | Expired / Lapsed | 1960-12-27 | 1964-12-29 | 0 | Details |
| US3163848A | Double error correcting system | Expired / Lapsed | 1959-12-22 | 1964-12-29 | 2 | Details |
| US3162837A | Error correcting code device with modulo-2 adder and feedba… | Expired / Lapsed | — | 1964-12-22 | 1 | Details |
| US3162770A | Transistor structure | Expired / Lapsed | 1958-09-26 | 1964-12-22 | 1 | Details |
| US3161542A | Peltier heating and cooling of substrates and masks | Expired / Lapsed | 1961-12-29 | 1964-12-15 | 2 | Details |
| US3160858A | Control system for computer | Expired / Lapsed | 1961-09-29 | 1964-12-08 | 2 | Details |
| US3160854A | Lattice-type character recognition system | Expired / Lapsed | 1961-01-12 | 1964-12-08 | 2 | Details |
| US3160853A | Character recognition apparatus | Expired / Lapsed | 1959-12-21 | 1964-12-08 | 2 | Details |
| US3157779A | Core matrix calculator | Expired / Lapsed | 1960-06-28 | 1964-11-17 | 2 | Details |
| US3157780A | Pulse train sensing circuitry | Expired / Lapsed | 1960-06-27 | 1964-11-17 | 1 | Details |
| US3157792A | Exclusive-or photoresponsive logical circuits | Expired / Lapsed | 1960-01-21 | 1964-11-17 | 1 | Details |
| US3156875A | Constant amplitude, variable frequency sawtooth generator | Expired / Lapsed | 1961-06-14 | 1964-11-10 | 2 | Details |
| US3156897A | Data processing system with look ahead feature | Expired / Lapsed | 1960-12-01 | 1964-11-10 | 2 | Details |
| US3156906A | Transducer positioning mechanism in a random access memory … | Expired / Lapsed | 1959-10-16 | 1964-11-10 | 2 | Details |
| US3154730A | Speed control of a d. c. motor | Expired / Lapsed | 1961-03-14 | 1964-10-27 | 2 | Details |
| US3154762A | Skew indicator | Expired / Lapsed | 1959-09-18 | 1964-10-27 | 1 | Details |
| US3153775A | Table look-up system | Expired / Lapsed | 1959-02-11 | 1964-10-20 | 2 | Details |
| US3152318A | Character recognizer | Expired / Lapsed | 1961-02-16 | 1964-10-06 | 2 | Details |
| US3150939A | High density record carrier | Expired / Lapsed | 1961-07-17 | 1964-09-29 | 2 | Details |
| US3150351A | Computer manual keyboard entry | Expired / Lapsed | 1957-09-10 | 1964-09-22 | 1 | Details |
| US3148366A | Analog to digital converter | Expired / Lapsed | 1962-12-24 | 1964-09-08 | 2 | Details |
| US3144635A | Error correcting system for binary erasure channel transmis… | Expired / Lapsed | 1961-12-14 | 1964-08-11 | 2 | Details |
| US3144366A | Method of fabricating a plurality of pn junctions in a semi… | Expired / Lapsed | 1961-08-16 | 1964-08-11 | 2 | Details |
| US3141964A | Calculating memory | Expired / Lapsed | 1960-12-30 | 1964-07-21 | 1 | Details |
| US3140473A | Information storage system | Expired / Lapsed | 1960-05-12 | 1964-07-07 | 2 | Details |
| US3140472A | Data transfer apparatus | Expired / Lapsed | 1959-12-30 | 1964-07-07 | 1 | Details |
| US3140466A | Character recognition system | Expired / Lapsed | 1957-12-23 | 1964-07-07 | 1 | Details |
| US3137818A | Signal generator with external start pulse phase control | Expired / Lapsed | 1961-12-27 | 1964-06-16 | 2 | Details |
| US3135946A | Error correction device | Expired / Lapsed | 1960-07-29 | 1964-06-02 | 2 | Details |
| US3134099A | Ultrasonic data converter | Expired / Lapsed | 1962-12-21 | 1964-05-19 | 2 | Details |
| US3132324A | Computer memory unit and addressing means | Expired / Lapsed | 1958-01-21 | 1964-05-05 | 2 | Details |
| US3131293A | Computing system | Expired / Lapsed | 1960-07-14 | 1964-04-28 | 2 | Details |
| US3130254A | Optical maser having terminal level above ground state | Expired / Lapsed | 1960-12-05 | 1964-04-21 | 2 | Details |
| US3128040A | Fluid logic device | Expired / Lapsed | 1962-10-29 | 1964-04-07 | 2 | Details |
| US3119984A | Analog voltage memory | Expired / Lapsed | 1960-12-22 | 1964-01-28 | 2 | Details |
| US3120001A | Magnetic transducer | Expired / Lapsed | 1958-12-08 | 1964-01-28 | 1 | Details |
| US3117306A | Multiplex computer inquiry stations | Expired / Lapsed | 1958-02-17 | 1964-01-07 | 2 | Details |
| US3116458A | Peak sensing system employing sampling and logic circuits c… | Expired / Lapsed | 1959-12-21 | 1963-12-31 | 2 | Details |
| US3115574A | High-speed multiplier | Expired / Lapsed | 1961-11-29 | 1963-12-24 | 1 | Details |
| US3115583A | Information-gated flip-flop adapted to generate output in r… | Expired / Lapsed | 1960-04-18 | 1963-12-24 | 2 | Details |
| US3114130A | Single error correcting system utilizing maximum length shi… | Expired / Lapsed | 1959-12-22 | 1963-12-10 | 2 | Details |
| US3114131A | Single track character sensing | Expired / Lapsed | 1958-10-15 | 1963-12-10 | 2 | Details |
| US3111648A | Conversion apparatus | Expired / Lapsed | 1960-03-31 | 1963-11-19 | 1 | Details |
| US3110620A | Method of making plural layer thin film devices | Expired / Lapsed | 1960-06-28 | 1963-11-12 | 2 | Details |
| US3108257A | Locking and unlocking of memory devices | Expired / Lapsed | 1958-12-30 | 1963-10-22 | 1 | Details |
| US3108256A | Logical clearing of memory devices | Expired / Lapsed | 1958-12-30 | 1963-10-22 | 2 | Details |
| US3107343A | Information retrieval system | Expired / Lapsed | 1959-11-27 | 1963-10-15 | 0 | Details |
| US3107301A | Pulse responsive photosensitive electrooptical circuit | Expired / Lapsed | 1956-01-18 | 1963-10-15 | 2 | Details |
| US3105963A | Transducer positioning system | Expired / Lapsed | 1959-02-27 | 1963-10-01 | 2 | Details |
| US3105228A | Magnetic drum system | Expired / Lapsed | 1960-04-25 | 1963-09-24 | 1 | Details |
| US3104380A | Memory system | Expired / Lapsed | 1959-11-27 | 1963-09-17 | 2 | Details |
| US3103658A | Character generation system | Expired / Lapsed | 1958-01-13 | 1963-09-10 | 2 | Details |
| US3103000A | Skew correction system | Expired / Lapsed | 1960-04-01 | 1963-09-03 | 2 | Details |
| US3100888A | Checking system | Expired / Lapsed | 1960-12-13 | 1963-08-13 | 0 | Details |
| US3100723A | Process of making multi-layer devices | Expired / Lapsed | 1960-08-29 | 1963-08-13 | 2 | Details |
| US3100889A | Apparatus for sensing variations | Expired / Lapsed | 1958-04-17 | 1963-08-13 | 2 | Details |
| US3099608A | Method of electroplating on a dielectric base | Expired / Lapsed | 1959-12-30 | 1963-07-30 | 2 | Details |
| US3099818A | Scan element for computer | Expired / Lapsed | 1959-06-30 | 1963-07-30 | 1 | Details |
| US3098939A | Integrating pulse circuit having regenerative feed back to … | Expired / Lapsed | 1961-12-21 | 1963-07-23 | 1 | Details |
| US3098803A | Thin magnetic film | Expired / Lapsed | 1960-06-23 | 1963-07-23 | 2 | Details |
| US3098112A | Vapor cell light modulator | Expired / Lapsed | 1959-07-22 | 1963-07-16 | 2 | Details |
| US3095654A | Educational device | Expired / Lapsed | 1961-09-14 | 1963-07-02 | 1 | Details |
| US3096471A | Optimizing automatic control servosystem | Expired / Lapsed | 1960-10-07 | 1963-07-02 | 2 | Details |
| US3096209A | Formation of semiconductor bodies | Expired / Lapsed | 1960-05-18 | 1963-07-02 | 0 | Details |
| US3096511A | Apparatus for effecting concurrent record, read and checkin… | Expired / Lapsed | 1959-02-25 | 1963-07-02 | 2 | Details |
| US3093814A | Tag memory | Expired / Lapsed | 1959-04-29 | 1963-06-11 | 2 | Details |
| US3089988A | Slewing motor servo system with null sensing relay circuit | Expired / Lapsed | 1960-06-29 | 1963-05-14 | 2 | Details |
| US3088888A | Methods of etching a semiconductor device | Expired / Lapsed | 1959-03-31 | 1963-05-07 | 2 | Details |
| US3086197A | Cryogenic memory system | Expired / Lapsed | 1958-12-19 | 1963-04-16 | 1 | Details |
| US3085230A | Method and apparatus for verifying location and recycling t… | Expired / Lapsed | 1958-11-14 | 1963-04-09 | 2 | Details |
| US3085232A | Magnetic storage devices | Expired / Lapsed | 1958-10-03 | 1963-04-09 | 2 | Details |
| US3081942A | Digital-to-analog control system | Expired / Lapsed | 1961-09-18 | 1963-03-19 | 2 | Details |
| US3082283A | Radiant energy responsive semiconductor device | Expired / Lapsed | 1959-11-25 | 1963-03-19 | 2 | Details |
| US3081447A | Apparatus and methods for automatic indexing and storage | Expired / Lapsed | 1961-04-10 | 1963-03-12 | 2 | Details |
| US3079597A | Byte converter | Expired / Lapsed | 1959-01-02 | 1963-02-26 | 2 | Details |
| US3079511A | Controlled, regenerative feedback transmission gate with sh… | Expired / Lapsed | 1958-12-31 | 1963-02-26 | 1 | Details |
| US3079594A | Decoding device | Expired / Lapsed | 1957-08-23 | 1963-02-26 | 1 | Details |
| US3078417A | Counter employing logic gates in feedback to achieve proper… | Expired / Lapsed | 1960-12-29 | 1963-02-19 | 2 | Details |
| US3078448A | Dual-channel sensing | Expired / Lapsed | 1957-07-15 | 1963-02-19 | 2 | Details |
| US3077580A | Data processing system | Expired / Lapsed | 1959-09-08 | 1963-02-12 | 2 | Details |
| US3077585A | Shift register | Expired / Lapsed | 1958-10-27 | 1963-02-12 | 2 | Details |
| US3077579A | Operation checking system for data storage and processing m… | Expired / Lapsed | 1958-08-29 | 1963-02-12 | 1 | Details |
| US3075091A | Data latching systems | Expired / Lapsed | 1960-02-03 | 1963-01-22 | 2 | Details |
| US3074050A | Character recognition machine | Expired / Lapsed | 1956-12-31 | 1963-01-15 | 1 | Details |
| US3072332A | Analog-to-digital converter | Expired / Lapsed | 1960-10-27 | 1963-01-08 | 1 | Details |
| US3070709A | Inverter circuit and complementing flip-flop using constant… | Expired / Lapsed | 1958-05-22 | 1962-12-25 | 0 | Details |
| US3069086A | Matrix switching and computing systems | Expired / Lapsed | 1959-11-05 | 1962-12-18 | 0 | Details |
| US3067937A | Control element for computing devices | Expired / Lapsed | 1959-06-08 | 1962-12-11 | 0 | Details |
| US3067358A | Electro-erosion apparatus | Expired / Lapsed | 1960-11-02 | 1962-12-04 | 0 | Details |
| US3066231A | Flip-flop circuit having pulse-forming networks in the cros… | Expired / Lapsed | 1958-07-30 | 1962-11-27 | 0 | Details |
| US3065356A | Electro-optical card reader | Expired / Lapsed | 1961-04-14 | 1962-11-20 | 0 | Details |
| US3064519A | Specimen identification apparatus and method | Expired / Lapsed | 1960-05-16 | 1962-11-20 | 0 | Details |
| US3064895A | Sensing instruction apparatus for data processing machine | Expired / Lapsed | 1958-02-05 | 1962-11-20 | 0 | Details |
| US3058659A | Add address to memory instruction | Expired / Lapsed | 1958-12-31 | 1962-10-16 | 0 | Details |
| US3059222A | Transfer instruction | Expired / Lapsed | 1958-12-31 | 1962-10-16 | 0 | Details |
| US3055770A | Thin magnetic films | Expired / Lapsed | 1960-12-23 | 1962-09-25 | 2 | Details |
| US3055006A | High density, erasable optical image recorder | Expired / Lapsed | 1961-01-24 | 1962-09-18 | 0 | Details |
| US3050673A | Voltage holding circuit | Expired / Lapsed | 1960-10-14 | 1962-08-21 | 0 | Details |
| US3050636A | High speed transistor switch | Expired / Lapsed | 1960-08-24 | 1962-08-21 | 0 | Details |
| US3048333A | Fast multiply apparatus in an electronic digital computer | Expired / Lapsed | 1957-12-26 | 1962-08-07 | 0 | Details |
| US3047438A | Epitaxial semiconductor deposition and apparatus | Expired / Lapsed | 1959-05-28 | 1962-07-31 | 1 | Details |
| US3047423A | Isotropic thin magnetic film | Expired / Lapsed | 1958-12-17 | 1962-07-31 | 1 | Details |
| US3046413A | Transistor multiple count trigger with stepwave generator g… | Expired / Lapsed | 1960-12-16 | 1962-07-24 | 0 | Details |
| US3046540A | Electro-optical translator | Expired / Lapsed | 1959-06-10 | 1962-07-24 | 0 | Details |
| US3046528A | Transfer mechanism for storage devices | Expired / Lapsed | 1957-09-06 | 1962-07-24 | 0 | Details |
| US3045209A | Checking system for data selection network | Expired / Lapsed | 1959-04-15 | 1962-07-17 | 0 | Details |
| US3043509A | Normalizing apparatus for floating point operations | Expired / Lapsed | 1959-09-08 | 1962-07-10 | 0 | Details |
| US3042903A | Means for transferring information between plural memory de… | Expired / Lapsed | 1957-01-15 | 1962-07-03 | 0 | Details |
| US3040300A | Data selector | Expired / Lapsed | 1957-03-25 | 1962-06-19 | 0 | Details |
| US3040299A | Data storage system | Expired / Lapsed | 1956-05-03 | 1962-06-19 | 0 | Details |
| US3039005A | Electro-optical device | Expired / Lapsed | 1960-04-08 | 1962-06-12 | 0 | Details |
| US3038091A | Threshold counter with parallel inputs | Expired / Lapsed | 1960-06-29 | 1962-06-05 | 0 | Details |
| US3037698A | Error controlled recycling of the readout of stored informa… | Expired / Lapsed | 1960-03-17 | 1962-06-05 | 0 | Details |
| US3038145A | Data transfer and control apparatus | Expired / Lapsed | 1958-03-19 | 1962-06-05 | 0 | Details |
| US3037265A | Method for making printed circuits | Expired / Lapsed | 1957-12-30 | 1962-06-05 | 0 | Details |
| US3037700A | Indexing registers for calculators | Expired / Lapsed | 1956-11-29 | 1962-06-05 | 0 | Details |
| US3037701A | Floating decimal point arithmetic control means for calcula… | Expired / Lapsed | 1956-11-21 | 1962-06-05 | 0 | Details |
| US3036775A | Function generators | Expired / Lapsed | 1960-08-11 | 1962-05-29 | 0 | Details |
| US3037199A | Thin film switching circuit | Expired / Lapsed | 1959-09-14 | 1962-05-29 | 0 | Details |
| US3036770A | Error detecting system for a digital computer | Expired / Lapsed | 1958-08-05 | 1962-05-29 | 0 | Details |
| US3036773A | Indirect addressing in an electronic data processing machine | Expired / Lapsed | 1957-12-26 | 1962-05-29 | 0 | Details |
| US3037128A | Passive element binary circuit gate | Expired / Lapsed | 1957-12-23 | 1962-05-29 | 0 | Details |
| US3037191A | Checking system | Expired / Lapsed | 1956-04-17 | 1962-05-29 | 0 | Details |
| US3036226A | Negative resistance semiconductor circuit utilizing four-la… | Expired / Lapsed | 1959-05-01 | 1962-05-22 | 0 | Details |
| US3035255A | Magnetic recording system | Expired / Lapsed | 1958-12-22 | 1962-05-15 | 0 | Details |
| US3034111A | Data storage system | Expired / Lapsed | 1958-11-24 | 1962-05-08 | 0 | Details |
| US3034103A | Data comparing and sorting apparatus | Expired / Lapsed | 1958-08-06 | 1962-05-08 | 0 | Details |
| US3028081A | Remote reader system | Expired / Lapsed | 1960-08-23 | 1962-04-03 | 0 | Details |
| US3028581A | Switching device | Expired / Lapsed | 1959-05-28 | 1962-04-03 | 0 | Details |
| US3028088A | Multipurpose logical operations | Expired / Lapsed | 1956-09-25 | 1962-04-03 | 0 | Details |
| US3028078A | Navigation system | Expired / Lapsed | 1953-12-08 | 1962-04-03 | 0 | Details |
| US3026037A | Set bit instructions | Expired / Lapsed | 1958-12-31 | 1962-03-20 | 0 | Details |
| US3026036A | Data transfer apparatus | Expired / Lapsed | 1956-01-24 | 1962-03-20 | 0 | Details |
| US3023727A | Substrate processing apparatus | Expired / Lapsed | 1959-09-10 | 1962-03-06 | 0 | Details |
| US3023404A | Magnetic drum head positioning system | Expired / Lapsed | 1957-12-31 | 1962-02-27 | 0 | Details |
| US3022005A | System for comparing information items to determine similar… | Expired / Lapsed | 1959-01-12 | 1962-02-20 | 0 | Details |
| US3021511A | Magnetic memory system | Expired / Lapsed | 1958-12-19 | 1962-02-13 | 0 | Details |
| US3021464A | Tool depth control system | Expired / Lapsed | 1958-03-27 | 1962-02-13 | 0 | Details |
| US3019976A | Data processing system including an indicating register | Expired / Lapsed | 1957-12-26 | 1962-02-06 | 0 | Details |
| US3018958A | Very high frequency computing circuit | Expired / Lapsed | 1956-08-31 | 1962-01-30 | 0 | Details |
| US3017092A | Program control for data storage and processing machine | Expired / Lapsed | 1957-09-06 | 1962-01-16 | 0 | Details |
| US3015733A | Bipolar switching ring | Expired / Lapsed | 1960-01-12 | 1962-01-02 | 0 | Details |
| US3015441A | Indexing system for calculators | Expired / Lapsed | 1957-09-04 | 1962-01-02 | 0 | Details |
| US3014820A | Vapor grown semiconductor device | Expired / Lapsed | 1959-12-31 | 1961-12-26 | 1 | Details |
| US3014654A | Random storage input device | Expired / Lapsed | 1956-04-20 | 1961-12-26 | 0 | Details |
| US3014659A | Electronic integrating means for continuous variable quanti… | Expired / Lapsed | 1953-11-27 | 1961-12-26 | 0 | Details |
| US3012711A | Telephone dial controlled perforator | Expired / Lapsed | 1957-12-30 | 1961-12-12 | 0 | Details |
| US3012726A | Electronic digital computing devices | Expired / Lapsed | 1957-07-22 | 1961-12-12 | 0 | Details |
| US3012713A | Typewriting calculating machine | Expired / Lapsed | 1957-05-17 | 1961-12-12 | 0 | Details |
| US3012227A | Signal storage system | Expired / Lapsed | 1956-09-26 | 1961-12-05 | 0 | Details |
| US3010649A | Fluid apparatus | Expired / Lapsed | 1959-05-27 | 1961-11-28 | 0 | Details |
| US3011061A | Device for identifying characters | Expired / Lapsed | 1959-04-20 | 1961-11-28 | 0 | Details |
| US3011133A | Oscillator utilizing avalanche breakdown of supercooled sem… | Expired / Lapsed | 1958-06-04 | 1961-11-28 | 0 | Details |
| US3007090A | Back resistance control for junction semiconductor devices | Expired / Lapsed | 1957-09-04 | 1961-10-31 | 0 | Details |
| US3007144A | Data storage apparatus | Expired / Lapsed | 1956-05-14 | 1961-10-31 | 0 | Details |
| US3005189A | Interrecord noise elimination | Expired / Lapsed | 1958-02-17 | 1961-10-17 | 0 | Details |
| US3003137A | Binary signal storage | Expired / Lapsed | 1955-11-07 | 1961-10-03 | 0 | Details |
| US3001140A | Data transmission | Expired / Lapsed | 1957-11-29 | 1961-09-19 | 0 | Details |
| US2997692A | Binary comparator | Expired / Lapsed | 1959-01-30 | 1961-08-22 | 0 | Details |
| US2997693A | Electrostatic storage system | Expired / Lapsed | 1957-12-31 | 1961-08-22 | 0 | Details |
| US2995727A | Means for comparing wave shapes | Expired / Lapsed | 1957-10-29 | 1961-08-08 | 0 | Details |
| US2994029A | Current supply apparatus | Expired / Lapsed | 1958-06-10 | 1961-07-25 | 0 | Details |
| US2994065A | Self-sorting storage devices | Expired / Lapsed | 1956-03-14 | 1961-07-25 | 0 | Details |
| US2992413A | Data storage system | Expired / Lapsed | 1955-06-28 | 1961-07-11 | 0 | Details |
| US2989732A | Time sequence addressing system | Expired / Lapsed | 1955-05-24 | 1961-06-20 | 0 | Details |
| US2988701A | Shifting registers | Expired / Lapsed | 1954-11-19 | 1961-06-13 | 0 | Details |
| US2982176A | Information storage and retrieval system | Expired / Lapsed | 1958-11-28 | 1961-05-02 | 0 | Details |
| US2981858A | Electroluminescent decals | Expired / Lapsed | 1959-07-21 | 1961-04-25 | 0 | Details |
| US2981940A | Communication systems | Expired / Lapsed | 1957-03-11 | 1961-04-25 | 0 | Details |
| US2979566A | Method and system for transmitting data | Expired / Lapsed | 1958-02-18 | 1961-04-11 | 0 | Details |
| US2978678A | Data transmission system | Expired / Lapsed | 1956-02-20 | 1961-04-04 | 0 | Details |
| US2978175A | Program control system for electronic digital computers | Expired / Lapsed | 1954-02-05 | 1961-04-04 | 0 | Details |
| US2975390A | Pluggable unit | Expired / Lapsed | 1958-12-31 | 1961-03-14 | 0 | Details |
| US2975377A | Two-terminal semiconductor high frequency oscillator | Expired / Lapsed | 1958-10-13 | 1961-03-14 | 0 | Details |
| US2975407A | Erase forward | Expired / Lapsed | 1958-03-03 | 1961-03-14 | 0 | Details |
| US2973508A | Comparator | Expired / Lapsed | 1958-11-19 | 1961-02-28 | 0 | Details |
| US2972742A | Automatic position-reporting system | Expired / Lapsed | 1956-09-12 | 1961-02-21 | 0 | Details |
| US2969730A | Data translation and printing | Expired / Lapsed | 1959-12-31 | 1961-01-31 | 0 | Details |
| US2969912A | Error detecting and correcting circuits | Expired / Lapsed | 1957-02-26 | 1961-01-31 | 0 | Details |
| US2969522A | Data transmission and storage system | Expired / Lapsed | 1958-06-12 | 1961-01-24 | 0 | Details |
| US2968791A | Buffer storage system | Expired / Lapsed | 1956-05-21 | 1961-01-17 | 0 | Details |
| US2967664A | Electro-optical data processing system | Expired / Lapsed | 1960-03-21 | 1961-01-10 | 0 | Details |
| US2968027A | Data processing system memory controls | Expired / Lapsed | 1958-08-29 | 1961-01-10 | 0 | Details |
| US2967999A | Waveform measuring apparatus | Expired / Lapsed | 1957-11-27 | 1961-01-10 | 0 | Details |
| US2966305A | Simultaneous carry adder | Expired / Lapsed | 1957-08-16 | 1960-12-27 | 0 | Details |
| US2966664A | Magnetic core flip-flop | Expired / Lapsed | 1955-09-01 | 1960-12-27 | 0 | Details |
| US2963411A | Process for removing shorts from p-n junctions | Expired / Lapsed | 1957-12-24 | 1960-12-06 | 0 | Details |
| US2961642A | Peak sensing circuit | Expired / Lapsed | 1957-12-31 | 1960-11-22 | 0 | Details |
| US2960683A | Data coordinator | Expired / Lapsed | 1956-06-20 | 1960-11-15 | 0 | Details |
| US2959769A | Data consolidation systems | Expired / Lapsed | 1958-12-29 | 1960-11-08 | 0 | Details |
| US2959768A | Comparator | Expired / Lapsed | 1955-10-25 | 1960-11-08 | 0 | Details |
| US2958859A | Electrical encoding and decoding switching apparatus | Expired / Lapsed | 1955-06-01 | 1960-11-01 | 0 | Details |
| US2957626A | High-speed electronic calculator | Expired / Lapsed | 1955-11-21 | 1960-10-25 | 0 | Details |
| US2954164A | Check digit monitoring and correcting circuits | Expired / Lapsed | 1955-10-14 | 1960-09-27 | 0 | Details |
| US2952008A | Record actuated timing and checking means | Expired / Lapsed | 1957-12-26 | 1960-09-06 | 0 | Details |
| US2951637A | Floating decimal system | Expired / Lapsed | 1954-01-11 | 1960-09-06 | 0 | Details |
| US2951232A | Tape control circuits | Expired / Lapsed | 1955-11-21 | 1960-08-30 | 0 | Details |
| US2950052A | Analogue-to-digital precision integrator | Expired / Lapsed | 1954-12-29 | 1960-08-23 | 0 | Details |
| US2947882A | Transistor trigger circuits | Expired / Lapsed | 1957-12-30 | 1960-08-02 | 0 | Details |
| US2946983A | Comparison circuits | Expired / Lapsed | 1955-11-14 | 1960-07-26 | 0 | Details |
| US2942779A | Integrating device | Expired / Lapsed | 1952-09-30 | 1960-06-28 | 0 | Details |
| US2939119A | Core storage matrix | Expired / Lapsed | 1957-06-24 | 1960-05-31 | 0 | Details |
| US2939066A | Variable damped servomotor system | Expired / Lapsed | 1956-10-25 | 1960-05-31 | 0 | Details |
| US2939110A | Comparing device for employment in a record card collator o… | Expired / Lapsed | 1954-02-04 | 1960-05-31 | 0 | Details |
| US2935626A | Transistor switching circuit | Expired / Lapsed | 1957-02-25 | 1960-05-03 | 0 | Details |
| US2933298A | Integrating accelerometer | Expired / Lapsed | 1953-11-16 | 1960-04-19 | 0 | Details |
| US2932792A | Transistor testing method | Expired / Lapsed | 1957-12-31 | 1960-04-12 | 0 | Details |
| US2932451A | Matrix storage accumulator system | Expired / Lapsed | 1955-10-31 | 1960-04-12 | 0 | Details |
| US2932449A | Integrating apparatus | Expired / Lapsed | 1954-01-25 | 1960-04-12 | 0 | Details |
| US2930908A | Superconductor switch | Expired / Lapsed | 1957-12-26 | 1960-03-29 | 0 | Details |
| US2931014A | Magnetic core buffer storage and conversion system | Expired / Lapsed | 1954-07-14 | 1960-03-29 | 0 | Details |
| US2931022A | Spot sequential character generator | Expired / Lapsed | 1954-06-16 | 1960-03-29 | 0 | Details |
| US2929050A | Double ended drive for selection lines of a core memory | Expired / Lapsed | 1955-05-27 | 1960-03-15 | 0 | Details |
| US2927432A | Hydraulic positioning device | Expired / Lapsed | 1958-03-18 | 1960-03-08 | 0 | Details |
| US2926850A | Binary adder subtracter | Expired / Lapsed | 1955-01-03 | 1960-03-01 | 0 | Details |
| US2925218A | Instruction controlled shifting device | Expired / Lapsed | 1954-11-15 | 1960-02-16 | 0 | Details |
| US2922985A | Shifting register and storage device therefor | Expired / Lapsed | 1953-03-05 | 1960-01-26 | 0 | Details |
| US2920822A | Subtraction circuits utilizing electrical delay lines | Expired / Lapsed | 1958-09-16 | 1960-01-12 | 0 | Details |
| US2921296A | Deskewing system | Expired / Lapsed | 1958-06-30 | 1960-01-12 | 0 | Details |
| US2920818A | Dynamic evaluator | Expired / Lapsed | 1954-12-31 | 1960-01-12 | 0 | Details |
| US2919426A | Character reader | Expired / Lapsed | 1958-03-12 | 1959-12-29 | 0 | Details |
| US2919002A | Selection mechanism for a single printing element typewriter | Expired / Lapsed | 1957-04-19 | 1959-12-29 | 0 | Details |
| US2919429A | Data transfer mechanism | Expired / Lapsed | 1954-10-25 | 1959-12-29 | 0 | Details |
| US2919425A | Reading apparatus | Expired / Lapsed | 1953-12-30 | 1959-12-29 | 0 | Details |
| US2915643A | Light gun assembly | Expired / Lapsed | 1956-06-21 | 1959-12-01 | 0 | Details |
| US2914728A | Hall effect probe | Expired / Lapsed | 1956-10-02 | 1959-11-24 | 0 | Details |
| US2909972A | Display apparatus employing electro-optical devices | Expired / Lapsed | 1958-09-15 | 1959-10-27 | 0 | Details |
| US2910634A | Semiconductor device | Expired / Lapsed | 1957-05-31 | 1959-10-27 | 0 | Details |
| US2909995A | Print checking circuit for accounting machines | Expired / Lapsed | 1956-12-31 | 1959-10-27 | 0 | Details |
| US2910235A | Drive and bit count control means for data handling matrix | Expired / Lapsed | 1956-10-15 | 1959-10-27 | 0 | Details |
| US2910236A | Calculator program system | Expired / Lapsed | 1954-01-15 | 1959-10-27 | 0 | Details |
| US2907937A | Digital servo system | Expired / Lapsed | 1957-12-26 | 1959-10-06 | 0 | Details |
| US2907926A | Electrical circuit assembly | Expired / Lapsed | 1955-12-09 | 1959-10-06 | 0 | Details |
| US2907009A | Magnetic head commutator | Expired / Lapsed | 1956-07-05 | 1959-09-29 | 0 | Details |
| US2906819A | Data reading machine | Expired / Lapsed | 1954-07-06 | 1959-09-29 | 0 | Details |
| US2903604A | Multistable circuit | Expired / Lapsed | 1955-01-03 | 1959-09-08 | 0 | Details |
| US2902677A | Magnetic core current driver | Expired / Lapsed | 1954-07-02 | 1959-09-01 | 0 | Details |
| US2901166A | Digital computer | Expired / Lapsed | 1953-02-05 | 1959-08-25 | 0 | Details |
| US2898248A | Method of fabricating germanium bodies | Expired / Lapsed | 1957-05-15 | 1959-08-04 | 1 | Details |
| US2898580A | Improved readout circuit for multistable magnetic cores | Expired / Lapsed | 1956-10-23 | 1959-08-04 | 0 | Details |
| US2898247A | Fabrication of diffused junction semi-conductor devices | Expired / Lapsed | 1955-10-24 | 1959-08-04 | 1 | Details |
| US2898041A | Instruction modifier means for electronic digital computing… | Expired / Lapsed | 1953-12-21 | 1959-08-04 | 0 | Details |
| US2895671A | Electronic digital computing machines | Expired / Lapsed | 1954-03-23 | 1959-07-21 | 0 | Details |
| US2895106A | Tester | Expired / Lapsed | 1958-04-29 | 1959-07-14 | 0 | Details |
| US2894128A | Mono-stable multivibrator | Expired / Lapsed | 1954-12-24 | 1959-07-07 | 0 | Details |
| US2889532A | Wiring assembly with stacked conductor cards | Expired / Lapsed | 1956-09-04 | 1959-06-02 | 0 | Details |
| US2889535A | Recognition of recorded intelligence | Expired / Lapsed | 1955-10-20 | 1959-06-02 | 0 | Details |
| US2889499A | Bistable semiconductor device | Expired / Lapsed | 1954-09-27 | 1959-06-02 | 3 | Details |
| US2888578A | Transistor emitter-follower circuits | Expired / Lapsed | 1954-09-30 | 1959-05-26 | 0 | Details |
| US2885149A | Transistor full adder | Expired / Lapsed | 1956-09-04 | 1959-05-05 | 0 | Details |
| US2882423A | Ring circuit | Expired / Lapsed | 1954-09-30 | 1959-04-14 | 0 | Details |
| US2880392A | Digital microvolt measuring device | Expired / Lapsed | 1953-11-30 | 1959-03-31 | 0 | Details |
| US2878398A | Electric circuits including transistors | Expired / Lapsed | 1953-12-31 | 1959-03-17 | 0 | Details |
| US2875951A | Synchronization of display means to specific microsecond in… | Expired / Lapsed | 1955-05-23 | 1959-03-03 | 0 | Details |
| US2872671A | Shaft position indicating device | Expired / Lapsed | 1956-08-09 | 1959-02-03 | 0 | Details |
| US2872666A | Data transfer and translating system | Expired / Lapsed | 1955-12-21 | 1959-02-03 | 0 | Details |
| US2872391A | Method of making plated hole printed wiring boards | Expired / Lapsed | 1955-06-28 | 1959-02-03 | 2 | Details |
| US2872110A | Flexible electronic commutator | Expired / Lapsed | 1954-01-15 | 1959-02-03 | 0 | Details |
| US2872670A | Device to manifest an unknown voltage as a numerical quanti… | Expired / Lapsed | 1952-02-07 | 1959-02-03 | 0 | Details |
| US2870348A | System for selectively energizing one of three circuits res… | Expired / Lapsed | 1957-12-16 | 1959-01-20 | 0 | Details |
| US2869965A | Electro-sensitive digital data plotter | Expired / Lapsed | 1954-12-30 | 1959-01-20 | 0 | Details |
| US2869000A | Modified binary counter circuit | Expired / Lapsed | 1954-09-30 | 1959-01-13 | 0 | Details |
| US2868455A | Binary counter with fast carry | Expired / Lapsed | 1954-09-30 | 1959-01-13 | 0 | Details |
| US2864007A | Transistor trigger circuit | Expired / Lapsed | 1957-12-04 | 1958-12-09 | 0 | Details |
| US2861258A | Transistor amplifier circuit | Expired / Lapsed | 1954-09-30 | 1958-11-18 | 0 | Details |
| US2858888A | Relay storage and readout device | Expired / Lapsed | 1956-01-26 | 1958-11-04 | 0 | Details |
| US2855513A | Clipping circuit with clipping level automatically set by a… | Expired / Lapsed | 1955-11-30 | 1958-10-07 | 0 | Details |
| US2851660A | Circuit testing apparatus | Expired / Lapsed | 1953-10-26 | 1958-09-09 | 0 | Details |
| US2850240A | Rotational displacement indicating system | Expired / Lapsed | 1952-10-28 | 1958-09-02 | 0 | Details |
| US2848166A | Counter | Expired / Lapsed | 1955-11-03 | 1958-08-19 | 0 | Details |
| US2848608A | Electronic ring circuit | Expired / Lapsed | 1954-12-08 | 1958-08-19 | 0 | Details |
| US2847565A | Pulse gap detector | Expired / Lapsed | 1954-12-31 | 1958-08-12 | 0 | Details |
| US2846592A | Temperature compensated semiconductor devices | Expired / Lapsed | 1955-05-20 | 1958-08-05 | 0 | Details |
| US2842682A | Reversible shift register | Expired / Lapsed | 1956-09-04 | 1958-07-08 | 0 | Details |
| US2842755A | Ternary magnetic storage device | Expired / Lapsed | 1955-08-25 | 1958-07-08 | 0 | Details |
| US2842668A | High frequency transistor oscillator | Expired / Lapsed | 1955-05-25 | 1958-07-08 | 0 | Details |
| US2834831A | Data recording means | Expired / Lapsed | 1950-12-19 | 1958-05-13 | 0 | Details |
| US2832063A | System for recording punched card data on magnetic tape | Expired / Lapsed | 1953-12-31 | 1958-04-22 | 0 | Details |
| US2831131A | Linear-motor paper feed | Expired / Lapsed | 1955-12-20 | 1958-04-15 | 0 | Details |
| US2826139A | Printer with shifting printing means | Expired / Lapsed | 1954-08-25 | 1958-03-11 | 0 | Details |
| US2825889A | Switching network | Expired / Lapsed | 1955-01-03 | 1958-03-04 | 0 | Details |
| US2823368A | Data storage matrix | Expired / Lapsed | 1954-07-14 | 1958-02-11 | 0 | Details |
| US2819457A | Timing and clocking circuits | Expired / Lapsed | 1954-02-08 | 1958-01-07 | 0 | Details |
| US2818322A | Sorter for tape recorded data | Expired / Lapsed | 1953-05-26 | 1957-12-31 | 0 | Details |
| US2816050A | Method of forming monocrystals | Expired / Lapsed | 1953-12-18 | 1957-12-10 | 2 | Details |
| US2815488A | Non-linear capacitance or inductance switching, amplifying,… | Expired / Lapsed | 1954-04-28 | 1957-12-03 | 0 | Details |
| US2814794A | Non-destructive sensing of magnetic cores | Expired / Lapsed | 1955-08-17 | 1957-11-26 | 0 | Details |
| US2814031A | Magnetic storage keyboard | Expired / Lapsed | 1955-08-26 | 1957-11-19 | 0 | Details |
| US2812485A | Tachometer generator damped servo system | Expired / Lapsed | 1954-10-05 | 1957-11-05 | 0 | Details |
| US2807419A | Pre-set recycling glow transfer counter | Expired / Lapsed | 1954-05-17 | 1957-09-24 | 0 | Details |
| US2806986A | High performance servo system | Expired / Lapsed | 1954-12-31 | 1957-09-17 | 0 | Details |
| US2803177A | Apparatus and method for xerographic printing | Expired / Lapsed | 1953-12-31 | 1957-08-20 | 0 | Details |
| US2801334A | Dynamic storage circuit | Expired / Lapsed | 1953-04-06 | 1957-07-30 | 0 | Details |
| US2800539A | Program device | Expired / Lapsed | 1954-12-06 | 1957-07-23 | 0 | Details |
| US2798554A | Data transfer apparatus | Expired / Lapsed | 1955-12-30 | 1957-07-09 | 0 | Details |
| US2798199A | Resistance testing machine | Expired / Lapsed | 1954-04-19 | 1957-07-02 | 0 | Details |
| US2796634A | Reverse forming process for making shaped articles from pla… | Expired / Lapsed | 1953-12-21 | 1957-06-25 | 0 | Details |
| US2794081A | Circuit selector | Expired / Lapsed | 1955-01-12 | 1957-05-28 | 0 | Details |
| US2792779A | Vibrating printing means | Expired / Lapsed | 1954-06-21 | 1957-05-21 | 0 | Details |
| US2792991A | Electronic commutator for calculators | Expired / Lapsed | 1953-11-23 | 1957-05-21 | 0 | Details |
| US2792174A | Binary code converter | Expired / Lapsed | 1953-12-21 | 1957-05-14 | 0 | Details |
| US2790076A | Electronic storage device | Expired / Lapsed | 1953-11-05 | 1957-04-23 | 0 | Details |
| US2789766A | Record controlled machine | Expired / Lapsed | 1953-10-16 | 1957-04-23 | 0 | Details |
| US2782989A | Record sensing apparatus | Expired / Lapsed | 1953-12-30 | 1957-02-26 | 0 | Details |
| US2782397A | Piezoelectric interrogation of ferroelectric condensers | Expired / Lapsed | 1953-10-01 | 1957-02-19 | 0 | Details |
| US2774429A | Magnetic core converter and storage unit | Expired / Lapsed | 1953-05-28 | 1956-12-18 | 0 | Details |
| US2774868A | Binary-decade counter | Expired / Lapsed | 1951-12-21 | 1956-12-18 | 0 | Details |
| US2773444A | Magnetic core storage for business machines | Expired / Lapsed | 1953-11-27 | 1956-12-11 | 0 | Details |
| US2772410A | Transistor indicator circuit | Expired / Lapsed | 1954-09-30 | 1956-11-27 | 0 | Details |
| US2772370A | Binary trigger and counter circuits employing magnetic memo… | Expired / Lapsed | 1953-12-31 | 1956-11-27 | 0 | Details |
| US2771278A | Cooling apparatus | Expired / Lapsed | 1954-02-23 | 1956-11-20 | 0 | Details |
| US2771593A | Error position indicator for target manifestation device | Expired / Lapsed | 1954-01-20 | 1956-11-20 | 0 | Details |
| US2770797A | Data storage apparatus | Expired / Lapsed | 1951-12-31 | 1956-11-13 | 0 | Details |
| US2770725A | Binary-decade counter | Expired / Lapsed | 1951-12-21 | 1956-11-13 | 0 | Details |
| US2763851A | Gated diode transfer circuits | Expired / Lapsed | 1953-08-25 | 1956-09-18 | 0 | Details |
| US2757775A | Single printing element typewriter | Expired / Lapsed | 1953-01-19 | 1956-08-07 | 0 | Details |
| US2754360A | Character synthesizer | Expired / Lapsed | 1951-12-24 | 1956-07-10 | 0 | Details |
| FR1119767A | Column shift device with counting | Expired / Lapsed | 1955-01-10 | 1956-06-25 | 0 | Details |
| FR1119708A | Logic circuits using junction transistors | Expired / Lapsed | 1954-12-15 | 1956-06-22 | 0 | Details |
| US2750580A | Intermediate magnetic core storage | Expired / Lapsed | 1953-01-02 | 1956-06-12 | 0 | Details |
| US2749985A | Typewriting and code perforating machine | Expired / Lapsed | 1951-12-21 | 1956-06-12 | 0 | Details |
| US2750532A | Cathode-ray devices, particularly for electronic computers | Expired / Lapsed | 1948-06-03 | 1956-06-12 | 0 | Details |
| US2745956A | Diode protection circuit | Expired / Lapsed | 1951-12-31 | 1956-05-15 | 0 | Details |
| FR1114472A | Circuit tester | Expired / Lapsed | 1954-10-19 | 1956-04-12 | 0 | Details |
| US2741312A | Indicia-controlled record perforating machine | Expired / Lapsed | 1951-09-18 | 1956-04-10 | 0 | Details |
| US2740949A | Multidimensional magnetic memory systems | Expired / Lapsed | 1953-08-25 | 1956-04-03 | 0 | Details |
| US2738499A | Apparatus for identifying line traces | Expired / Lapsed | 1953-06-22 | 1956-03-13 | 0 | Details |
| US2731196A | Self-checking number punch | Expired / Lapsed | 1951-11-14 | 1956-01-17 | 0 | Details |
| US2730655A | Gas tube counter | Expired / Lapsed | 1953-03-12 | 1956-01-10 | 0 | Details |
| US2726940A | Xerographic printer | Expired / Lapsed | 1954-11-03 | 1955-12-13 | 2 | Details |
| US2724061A | Single transistor binary trigger | Expired / Lapsed | 1954-04-28 | 1955-11-15 | 0 | Details |
| US2720642A | Flashtube ignition circuit for record controlled machines | Expired / Lapsed | 1951-05-26 | 1955-10-11 | 0 | Details |
| US2718356A | Data conversion system | Expired / Lapsed | 1952-04-29 | 1955-09-20 | 0 | Details |
| US2717686A | Word writing typewriter | Expired / Lapsed | 1952-11-05 | 1955-09-13 | 0 | Details |
| US2717733A | Typewriter controlled calculator | Expired / Lapsed | 1951-08-15 | 1955-09-13 | 0 | Details |
| US2717994A | Measuring and indicating system | Expired / Lapsed | 1951-05-26 | 1955-09-13 | 0 | Details |
| US2709757A | Eerroresonant flip-flops | Expired / Lapsed | 1953-08-25 | 1955-05-31 | 0 | Details |
| US2708267A | Record conversion system | Expired / Lapsed | 1953-12-31 | 1955-05-10 | 0 | Details |
| US2703202A | Electronic binary algebraic accumulator | Expired / Lapsed | 1950-03-21 | 1955-03-01 | 0 | Details |
| FR1086430A | Electronic counter | Expired / Lapsed | 1953-07-20 | 1955-02-11 | 0 | Details |
| US2700750A | Measuring and indicating system | Expired / Lapsed | 1952-04-25 | 1955-01-25 | 0 | Details |
| US2700502A | Multidigit shifting device | Expired / Lapsed | 1952-03-27 | 1955-01-25 | 0 | Details |
| US2700703A | Magnetic reproducer | Expired / Lapsed | 1950-12-29 | 1955-01-25 | 0 | Details |
| US2696420A | Bipolar magnetic recorder | Expired / Lapsed | 1950-12-14 | 1954-12-07 | 0 | Details |
| US2695993A | Magnetic core logical circuits | Expired / Lapsed | 1953-07-30 | 1954-11-30 | 0 | Details |
| US2695992A | Peak sensing circuit | Expired / Lapsed | 1951-12-21 | 1954-11-30 | 0 | Details |
| FR1078431A | Displacement control device for magnetic drum calculators | Expired / Lapsed | 1952-12-30 | 1954-11-18 | 0 | Details |
| US2685049A | Coincidence circuit | Expired / Lapsed | 1951-10-31 | 1954-07-27 | 0 | Details |
| US2682043A | Character sensing and analyzing system | Expired / Lapsed | 1951-12-27 | 1954-06-22 | 0 | Details |
| US2672287A | Record strip positioning device | Expired / Lapsed | 1951-04-11 | 1954-03-16 | 0 | Details |
| US2672283A | Electronic multiplier | Expired / Lapsed | 1948-09-03 | 1954-03-16 | 0 | Details |
| US2666150A | Crystal tetrode | Expired / Lapsed | 1950-05-04 | 1954-01-12 | 0 | Details |
| US2658681A | Electronic calculator | Expired / Lapsed | 1948-07-09 | 1953-11-10 | 0 | Details |
| US2654812A | Alphabetic keyboard controller | Expired / Lapsed | 1951-07-02 | 1953-10-06 | 0 | Details |
| US2651728A | Semiconductor trigger circuit | Expired / Lapsed | 1951-07-02 | 1953-09-08 | 0 | Details |
| US2651204A | Automatic pressure measuring and indicating system | Expired / Lapsed | 1950-03-09 | 1953-09-08 | 0 | Details |
| US2649513A | Distributor and method for making the same | Expired / Lapsed | 1949-03-08 | 1953-08-18 | 0 | Details |
| US2641976A | Photographic color recording machine | Expired / Lapsed | 1949-08-13 | 1953-06-16 | 0 | Details |
| US2641407A | Electronic multiplier | Expired / Lapsed | 1949-06-18 | 1953-06-09 | 0 | Details |
| US2637763A | Pluggable support for electron tube and circuit | Expired / Lapsed | 1948-07-09 | 1953-05-05 | 0 | Details |
| US2636672A | Selective sequence electronic calculator | Expired / Lapsed | 1949-01-19 | 1953-04-28 | 0 | Details |
| US2628309A | Electronic storage device | Expired / Lapsed | 1951-12-31 | 1953-02-10 | 0 | Details |
| US2623171A | Electronic divider | Expired / Lapsed | 1950-12-27 | 1952-12-23 | 0 | Details |
| US2620978A | Sensing mechanism | Expired / Lapsed | 1951-06-02 | 1952-12-09 | 0 | Details |
| US2618386A | Record card sorting device | Expired / Lapsed | 1950-01-10 | 1952-11-18 | 0 | Details |
| US2617048A | Photoelectric inspection device | Expired / Lapsed | 1948-01-09 | 1952-11-04 | 0 | Details |
| US2616624A | Calculator | Expired / Lapsed | 1945-02-08 | 1952-11-04 | 0 | Details |
| US2616626A | Calculator | Expired / Lapsed | 1945-02-08 | 1952-11-04 | 0 | Details |
| US2613287A | Cross connecting board | Expired / Lapsed | 1948-10-27 | 1952-10-07 | 0 | Details |
| US2609050A | Magnetic tape controlled punch | Expired / Lapsed | 1947-12-06 | 1952-09-02 | 0 | Details |
| US2605871A | Fastening device | Expired / Lapsed | 1949-03-03 | 1952-08-05 | 0 | Details |
| US2606244A | Data receiving and retaining mechanism | Expired / Lapsed | 1948-03-30 | 1952-08-05 | 0 | Details |
| US2604262A | Multiplying and dividing means | Expired / Lapsed | 1949-01-19 | 1952-07-22 | 0 | Details |
| US2595889A | Perforated-tape control of highspeed tabulating-card punches | Expired / Lapsed | 1945-10-24 | 1952-05-06 | 0 | Details |
| US2594737A | Control panel for accounting machines | Expired / Lapsed | 1949-09-29 | 1952-04-29 | 0 | Details |
| US2594742A | Two source binary-decade counter | Expired / Lapsed | 1949-01-12 | 1952-04-29 | 0 | Details |
| US2593371A | Electrically operated stenographic machine | Expired / Lapsed | 1949-07-26 | 1952-04-15 | 0 | Details |
| US2588049A | Comparing device | Expired / Lapsed | 1950-10-28 | 1952-03-04 | 0 | Details |
| US2587979A | Electronic system | Expired / Lapsed | 1948-04-23 | 1952-03-04 | 0 | Details |
| US2584811A | Electronic counting circuit | Expired / Lapsed | 1946-03-13 | 1952-02-05 | 0 | Details |
| US2580771A | Stepping register | Expired / Lapsed | 1950-11-28 | 1952-01-01 | 0 | Details |
| US2580870A | Accumulator | Expired / Lapsed | 1949-11-25 | 1952-01-01 | 0 | Details |
| US2580768A | Data look-up apparatus for computing or other machines | Expired / Lapsed | 1947-08-14 | 1952-01-01 | 0 | Details |
| US2577075A | Binary-decade counter | Expired / Lapsed | 1949-01-21 | 1951-12-04 | 0 | Details |
| US2573356A | Accounting machine for comparing totals on two accumulators | Expired / Lapsed | 1950-09-30 | 1951-10-30 | 0 | Details |
| US2573317A | Consecutive blank column detector | Expired / Lapsed | 1950-07-13 | 1951-10-30 | 0 | Details |
| US2569830A | Accounting machine with means for handling positive and neg… | Expired / Lapsed | 1950-03-04 | 1951-10-02 | 0 | Details |
| US2569827A | Polarity pulsing of triggers | Expired / Lapsed | 1948-12-29 | 1951-10-02 | 0 | Details |
| US2566931A | Record card punching machine | Expired / Lapsed | 1948-11-23 | 1951-09-04 | 0 | Details |
| US2566947A | Electrical multiplying and dividing machine | Expired / Lapsed | 1948-01-16 | 1951-09-04 | 0 | Details |
| US2566944A | Typesetting means in record controlled printing machines | Expired / Lapsed | 1947-09-19 | 1951-09-04 | 0 | Details |
| US2559627A | Mark tester | Expired / Lapsed | 1948-03-12 | 1951-07-10 | 0 | Details |
| US2554707A | Printing and punching device | Expired / Lapsed | 1947-11-24 | 1951-05-29 | 0 | Details |
| US2553170A | Pattern component emitter | Expired / Lapsed | 1948-04-27 | 1951-05-15 | 0 | Details |
| US2551104A | Asymmetrical trigger circuit | Expired / Lapsed | 1949-01-12 | 1951-05-01 | 0 | Details |
| US2551119A | Electronic commutator | Expired / Lapsed | 1948-07-09 | 1951-05-01 | 0 | Details |
| US2540025A | Neutralized trigger circuit | Expired / Lapsed | 1948-11-17 | 1951-01-30 | 0 | Details |
| US2540030A | Selectively controlled recording apparatus | Expired / Lapsed | 1948-05-12 | 1951-01-30 | 0 | Details |
| US2536916A | Electronic counting system | Expired / Lapsed | 1945-12-21 | 1951-01-02 | 0 | Details |
| US2536955A | Electronic accounting machine | Expired / Lapsed | 1944-12-27 | 1951-01-02 | 0 | Details |
| US2524154A | Electrical trigger | Expired / Lapsed | 1949-01-05 | 1950-10-03 | 0 | Details |
| US2524123A | Electronic system | Expired / Lapsed | 1945-03-23 | 1950-10-03 | 0 | Details |
| US2521350A | Electronic counter | Expired / Lapsed | 1947-11-24 | 1950-09-05 | 0 | Details |
| US2514054A | Comparing mechanism | Expired / Lapsed | 1948-05-06 | 1950-07-04 | 0 | Details |
| US2514031A | Record perforation analyzing mechanism | Expired / Lapsed | 1946-06-18 | 1950-07-04 | 0 | Details |
| US2511996A | Electric comparing mechanism | Expired / Lapsed | 1947-02-07 | 1950-06-20 | 0 | Details |
| US2510552A | Pneumatic record sensing device | Expired / Lapsed | 1948-01-29 | 1950-06-06 | 0 | Details |
| US2502960A | Record controlled punching machine | Expired / Lapsed | 1946-09-06 | 1950-04-04 | 0 | Details |
| US2501821A | Multidigit number comparing device | Expired / Lapsed | 1947-07-17 | 1950-03-28 | 0 | Details |
| US2501495A | Copying process | Expired / Lapsed | 1946-05-04 | 1950-03-21 | 0 | Details |
| US2500294A | Descending counter | Expired / Lapsed | 1947-08-13 | 1950-03-14 | 0 | Details |
| US2496579A | Sensing system for magnetically recorded signals | Expired / Lapsed | 1949-01-05 | 1950-02-07 | 0 | Details |
| US2496585A | Contiguous rotation counter | Expired / Lapsed | 1948-06-26 | 1950-02-07 | 0 | Details |
| US2493897A | Speed responsive switch | Expired / Lapsed | 1947-06-07 | 1950-01-10 | 0 | Details |
| US2493848A | Record card | Expired / Lapsed | 1947-03-28 | 1950-01-10 | 0 | Details |
| US2493862A | Dividing machine | Expired / Lapsed | 1946-10-03 | 1950-01-10 | 0 | Details |
| US2484642A | Record card | Expired / Lapsed | 1945-12-17 | 1949-10-11 | 0 | Details |
| US2484115A | Carry device | Expired / Lapsed | 1945-11-27 | 1949-10-11 | 0 | Details |
| US2478275A | Record card sensing device | Expired / Lapsed | 1948-01-13 | 1949-08-09 | 0 | Details |
| US2469655A | Counter actuating and resetting mechanism | Expired / Lapsed | 1945-02-21 | 1949-05-10 | 0 | Details |
| US2464561A | Record feeding machine | Expired / Lapsed | 1943-06-24 | 1949-03-15 | 0 | Details |
| US2461412A | Accounting apparatus | Expired / Lapsed | 1945-03-17 | 1949-02-08 | 0 | Details |
| US2456825A | Distributor | Expired / Lapsed | 1945-10-18 | 1948-12-21 | 0 | Details |
| US2456818A | Electronic trigger circuit with pulse output attenuating me… | Expired / Lapsed | 1945-03-17 | 1948-12-21 | 0 | Details |
| US2451722A | Power-operated skip tabulating mechanism for typewriting ma… | Expired / Lapsed | 1945-02-24 | 1948-10-19 | 0 | Details |
| US2448761A | Circuit bearing element | Expired / Lapsed | 1947-10-23 | 1948-09-07 | 0 | Details |
| US2448842A | Record-controlled printing apparatus | Expired / Lapsed | 1945-06-09 | 1948-09-07 | 0 | Details |
| US2447800A | Sequential electronic commutator with supplementary grid co… | Expired / Lapsed | 1945-04-10 | 1948-08-24 | 0 | Details |
| US2447799A | Sequential electronic commutator with supplementary grid co… | Expired / Lapsed | 1945-04-05 | 1948-08-24 | 0 | Details |
| US2438071A | Perforated card controlled alphabet and numeral printer | Expired / Lapsed | 1944-12-23 | 1948-03-16 | 0 | Details |
| US2438081A | Record controlled accounting machine | Expired / Lapsed | 1943-07-15 | 1948-03-16 | 0 | Details |
| US2436829A | Bipolar magnetic control record | Expired / Lapsed | 1945-01-31 | 1948-03-02 | 0 | Details |
| US2434500A | Accounting machine | Expired / Lapsed | 1945-06-14 | 1948-01-13 | 0 | Details |
| US2434487A | Record controlled adding and comparing machine | Expired / Lapsed | 1941-09-13 | 1948-01-13 | 0 | Details |
| US2431058A | Control mechanism for dispensing apparatus | Expired / Lapsed | 1942-08-22 | 1947-11-18 | 0 | Details |
| US2428605A | Stenographic machine | Expired / Lapsed | 1944-10-21 | 1947-10-07 | 0 | Details |
| US2425549A | Calculation checking device | Expired / Lapsed | 1944-08-31 | 1947-08-12 | 0 | Details |
| US2424088A | Educational device for aerial gunners | Expired / Lapsed | 1945-02-02 | 1947-07-15 | 0 | Details |
| US2424118A | Apparatus for continuously recording the path of flight of … | Expired / Lapsed | 1943-04-29 | 1947-07-15 | 0 | Details |
| US2421606A | Apparatus for producing sharply defined signaling impulses | Expired / Lapsed | 1942-11-14 | 1947-06-03 | 0 | Details |
| US2417369A | Multiple circuit connector of the plug type | Expired / Lapsed | 1944-03-29 | 1947-03-11 | 0 | Details |
| US2407176A | Plugboard | Expired / Lapsed | 1944-12-12 | 1946-09-03 | 0 | Details |
| US2407196A | Accounting machine | Expired / Lapsed | 1943-07-15 | 1946-09-03 | 0 | Details |
| US2405287A | Record controlled accounting machine | Expired / Lapsed | 1943-01-01 | 1946-08-06 | 0 | Details |
| US2402989A | Accumulating apparatus | Expired / Lapsed | 1941-05-23 | 1946-07-02 | 0 | Details |
| US2402988A | Accounting apparatus | Expired / Lapsed | 1941-05-23 | 1946-07-02 | 0 | Details |
| US2403005A | Typewriting calculating machine | Expired / Lapsed | 1939-11-24 | 1946-07-02 | 0 | Details |
| US2401430A | Plugboard contactors | Expired / Lapsed | 1944-12-15 | 1946-06-04 | 0 | Details |
| US2398036A | Printing mechanism | Expired / Lapsed | 1943-04-21 | 1946-04-09 | 0 | Details |
| US2394924A | Electric calculating machine | Expired / Lapsed | 1943-03-30 | 1946-02-12 | 0 | Details |
| US2394637A | Accounting machine | Expired / Lapsed | 1941-05-24 | 1946-02-12 | 0 | Details |
| US2390439A | Optical record interpreter | Expired / Lapsed | 1943-02-02 | 1945-12-04 | 0 | Details |
| US2388351A | Signal controlled printing apparatus | Expired / Lapsed | 1944-12-22 | 1945-11-06 | 0 | Details |
| US2381862A | Printing mechanism | Expired / Lapsed | 1944-03-10 | 1945-08-14 | 0 | Details |
| US2377762A | Accounting machine | Expired / Lapsed | 1941-07-08 | 1945-06-05 | 0 | Details |
| US2375332A | Record controlled accounting machine | Expired / Lapsed | 1940-05-23 | 1945-05-08 | 0 | Details |
| US2372887A | Record controlled tape perforator with manually controlled … | Expired / Lapsed | 1944-05-03 | 1945-04-03 | 0 | Details |
| US2372882A | Card sensing machine | Expired / Lapsed | 1941-12-23 | 1945-04-03 | 0 | Details |
| US2370989A | Code translating recorder | Expired / Lapsed | 1943-12-28 | 1945-03-06 | 0 | Details |
| US2369474A | Code translator | Expired / Lapsed | 1943-12-10 | 1945-02-13 | 0 | Details |
| US2369431A | Photographic identifying mark recorder | Expired / Lapsed | 1940-05-24 | 1945-02-13 | 0 | Details |
| US2366827A | Record sensing device | Expired / Lapsed | 1939-12-15 | 1945-01-09 | 0 | Details |
| US2364540A | Calculating machine | Expired / Lapsed | 1942-10-10 | 1944-12-05 | 0 | Details |
| US2364207A | Automatic punching machine | Expired / Lapsed | 1941-01-30 | 1944-12-05 | 0 | Details |
| US2362027A | Communication apparatus | Expired / Lapsed | 1943-11-13 | 1944-11-07 | 0 | Details |
| US2359617A | Magnetic recording apparatus | Expired / Lapsed | 1941-11-29 | 1944-10-03 | 0 | Details |
| US2359616A | Accounting machine | Expired / Lapsed | 1941-06-18 | 1944-10-03 | 0 | Details |
| US2359631A | Dividing machine | Expired / Lapsed | 1941-04-15 | 1944-10-03 | 0 | Details |
| US2359670A | Record controlled machine | Expired / Lapsed | 1936-12-24 | 1944-10-03 | 0 | Details |
| US2357455A | Accounting machine | Expired / Lapsed | 1940-10-30 | 1944-09-05 | 0 | Details |
| US2353083A | Recording machine | Expired / Lapsed | 1942-08-27 | 1944-07-04 | 0 | Details |
| US2353003A | Record sensing device | Expired / Lapsed | 1940-11-15 | 1944-07-04 | 0 | Details |
| US2353002A | Dispensing and tabulating machine | Expired / Lapsed | 1938-06-09 | 1944-07-04 | 0 | Details |
| US2350405A | Automatic meter reading apparatus | Expired / Lapsed | 1942-04-18 | 1944-06-06 | 0 | Details |
| US2348141A | Computing mechanism | Expired / Lapsed | 1939-05-31 | 1944-05-02 | 0 | Details |
| US2346250A | Accounting machine | Expired / Lapsed | 1939-12-06 | 1944-04-11 | 0 | Details |
| US2344254A | Telemetering apparatus | Expired / Lapsed | 1943-01-27 | 1944-03-14 | 0 | Details |
| US2343414A | Punching machine | Expired / Lapsed | 1943-02-24 | 1944-03-07 | 0 | Details |
| US2338206A | Multiplying machine | Expired / Lapsed | 1941-06-12 | 1944-01-04 | 0 | Details |
| US2335928A | Record feeding and sensing device | Expired / Lapsed | 1940-06-19 | 1943-12-07 | 0 | Details |
| US2335755A | Automatic telemetering system | Expired / Lapsed | 1942-07-23 | 1943-11-30 | 0 | Details |
| US2333463A | Apparatus for recording statistical records | Expired / Lapsed | 1941-03-19 | 1943-11-02 | 0 | Details |
| US2330948A | Plugboard | Expired / Lapsed | 1942-04-10 | 1943-10-05 | 0 | Details |
| US2328623A | Dividing machine | Expired / Lapsed | 1942-06-04 | 1943-09-07 | 0 | Details |
| US2328611A | Dividing machine | Expired / Lapsed | 1942-04-18 | 1943-09-07 | 0 | Details |
| US2328638A | Printing mechanism | Expired / Lapsed | 1941-01-30 | 1943-09-07 | 0 | Details |
| US2325958A | Printing mechanism | Expired / Lapsed | 1940-12-27 | 1943-08-03 | 0 | Details |
| US2325409A | Meter reading apparatus | Expired / Lapsed | 1942-05-12 | 1943-07-27 | 0 | Details |
| US2323372A | Film data selecting and viewing machine | Expired / Lapsed | 1940-06-27 | 1943-07-06 | 0 | Details |
| US2320338A | Verifying machine | Expired / Lapsed | 1941-11-18 | 1943-06-01 | 0 | Details |
| US2320337A | Cathode tube recorder for calculating machines | Expired / Lapsed | 1939-06-30 | 1943-06-01 | 0 | Details |
| US2319412A | Automatic meter-reading apparatus | Expired / Lapsed | 1940-10-18 | 1943-05-18 | 0 | Details |
| US2318299A | Intercontrolled typewriter-punching machine | Expired / Lapsed | 1941-12-23 | 1943-05-04 | 0 | Details |
| US2315741A | Verifying machine | Expired / Lapsed | 1939-09-28 | 1943-04-06 | 0 | Details |
| US2314720A | Automatic meter-reading apparatus | Expired / Lapsed | 1940-10-18 | 1943-03-23 | 0 | Details |
| US2314719A | Automatic meter-reading apparatus | Expired / Lapsed | 1940-08-02 | 1943-03-23 | 0 | Details |
| US2314718A | Accounting apparatus | Expired / Lapsed | 1940-04-26 | 1943-03-23 | 0 | Details |
| US2310300A | Register mechanism for indicating instruments | Expired / Lapsed | 1940-08-02 | 1943-02-09 | 0 | Details |
| US2310445A | Perforated record card | Expired / Lapsed | 1938-12-16 | 1943-02-09 | 0 | Details |
| US2302002A | Record controlled perforating machine | Expired / Lapsed | 1941-11-29 | 1942-11-17 | 0 | Details |
| US2302081A | Signaling system | Expired / Lapsed | 1941-06-19 | 1942-11-17 | 0 | Details |
| US2302025A | Accounting machine | Expired / Lapsed | 1940-03-22 | 1942-11-17 | 0 | Details |
| US2302009A | Transmission system for statistical data | Expired / Lapsed | 1939-03-25 | 1942-11-17 | 0 | Details |
| US2297772A | Signaling system | Expired / Lapsed | 1941-06-19 | 1942-10-06 | 0 | Details |
| US2297793A | Communication system | Expired / Lapsed | 1940-01-27 | 1942-10-06 | 0 | Details |
| US2297789A | Transcribing apparatus | Expired / Lapsed | 1939-11-04 | 1942-10-06 | 0 | Details |
| US2297816A | Electrical control system | Expired / Lapsed | 1938-12-14 | 1942-10-06 | 0 | Details |
| US2295533A | Meter reading apparatus | Expired / Lapsed | 1940-08-02 | 1942-09-15 | 0 | Details |
| US2294720A | Apparatus for verifying statistical data | Expired / Lapsed | 1939-07-25 | 1942-09-01 | 0 | Details |
| US2294681A | Record card controlled machine | Expired / Lapsed | 1939-06-06 | 1942-09-01 | 0 | Details |
| US2288862A | Method of and means for preparing magnetizable bodies to re… | Expired / Lapsed | 1940-10-24 | 1942-07-07 | 0 | Details |
| US2288770A | Statistical record | Expired / Lapsed | 1936-12-30 | 1942-07-07 | 0 | Details |
| US2285819A | Automatic meter-reading apparatus | Expired / Lapsed | 1940-10-18 | 1942-06-09 | 0 | Details |
| US2285289A | Card punching machine | Expired / Lapsed | 1941-03-26 | 1942-06-02 | 0 | Details |
| US2285353A | Calculating machine | Expired / Lapsed | 1938-06-17 | 1942-06-02 | 0 | Details |
| US2283071A | Autoamtic meter-reading apparatus | Expired / Lapsed | 1940-10-18 | 1942-05-12 | 0 | Details |
| US2283070A | Automatic meter-reading apparatus | Expired / Lapsed | 1940-10-18 | 1942-05-12 | 0 | Details |
| US2282108A | Time delay circuit | Expired / Lapsed | 1940-11-20 | 1942-05-05 | 0 | Details |
| US2282066A | Relay | Expired / Lapsed | 1939-09-08 | 1942-05-05 | 0 | Details |
| US2282029A | Recording device | Expired / Lapsed | 1939-06-30 | 1942-05-05 | 0 | Details |
| US2282028A | Electrical accumulator | Expired / Lapsed | 1938-06-21 | 1942-05-05 | 0 | Details |
| US2279009A | Communication system | Expired / Lapsed | 1940-08-17 | 1942-04-07 | 0 | Details |
| US2275590A | Educational device | Expired / Lapsed | 1938-06-21 | 1942-03-10 | 0 | Details |
| US2275396A | Record controlled perforating machine | Expired / Lapsed | 1941-03-19 | 1942-03-03 | 0 | Details |
| US2272411A | Educational device | Expired / Lapsed | 1940-11-07 | 1942-02-10 | 0 | Details |
| US2267812A | Clock time and call indicating system | Expired / Lapsed | 1940-01-11 | 1941-12-30 | 0 | Details |
| US2268499A | Control element for statistical machines | Expired / Lapsed | 1939-06-30 | 1941-12-30 | 0 | Details |
| US2265462A | Record analyzing mechanism | Expired / Lapsed | 1939-09-15 | 1941-12-09 | 0 | Details |
| US2265445A | Record controlled machine | Expired / Lapsed | 1939-02-03 | 1941-12-09 | 0 | Details |
| US2264623A | Character displaying control apparatus | Expired / Lapsed | 1940-01-09 | 1941-12-02 | 0 | Details |
| US2258110A | Accounting machine | Expired / Lapsed | 1938-08-31 | 1941-10-07 | 0 | Details |
| US2258106A | Apparatus for preparing statistical records | Expired / Lapsed | 1938-06-17 | 1941-10-07 | 0 | Details |
| US2255030A | Keyboard locking device | Expired / Lapsed | 1939-10-05 | 1941-09-02 | 0 | Details |
| US2255011A | Recording machine | Expired / Lapsed | 1938-08-31 | 1941-09-02 | 0 | Details |
| US2254933A | Record controlled machine | Expired / Lapsed | 1938-06-17 | 1941-09-02 | 0 | Details |
| US2254931A | Control record for accounting machines | Expired / Lapsed | 1937-05-27 | 1941-09-02 | 0 | Details |
| US2247905A | Apparatus for preparing statistical records | Expired / Lapsed | 1939-07-25 | 1941-07-01 | 0 | Details |
| US2247908A | Apparatus for recording statistical data | Expired / Lapsed | 1939-07-25 | 1941-07-01 | 0 | Details |
| US2244252A | Paper spacing mechanism for printing machines | Expired / Lapsed | 1938-04-15 | 1941-06-03 | 0 | Details |
| US2244241A | Cross-adding accounting machine and programing means theref… | Expired / Lapsed | 1937-10-01 | 1941-06-03 | 0 | Details |
| US2244231A | Statistical record | Expired / Lapsed | 1936-12-17 | 1941-06-03 | 0 | Details |
| US2243474A | Number comparing means | Expired / Lapsed | 1937-12-07 | 1941-05-27 | 0 | Details |
| US2243473A | Dividing machine | Expired / Lapsed | 1936-07-08 | 1941-05-27 | 0 | Details |
| US2240545A | Reading machine | Expired / Lapsed | 1936-10-28 | 1941-05-06 | 0 | Details |
| US2240544A | Reading machine | Expired / Lapsed | 1936-10-27 | 1941-05-06 | 0 | Details |
| US2234241A | Tabulating machine | Expired / Lapsed | 1936-11-05 | 1941-03-11 | 0 | Details |
| US2232006A | Accounting machine | Expired / Lapsed | 1937-12-30 | 1941-02-18 | 0 | Details |
| US2230673A | Multiplying and checking machine | Expired / Lapsed | 1936-09-25 | 1941-02-04 | 0 | Details |
| US2228330A | Calculating machine | Expired / Lapsed | 1937-06-09 | 1941-01-14 | 0 | Details |
| US2224764A | Data reproducing machine | Expired / Lapsed | 1939-06-16 | 1940-12-10 | 0 | Details |
| US2224774A | Tabulating machine | Expired / Lapsed | 1936-06-24 | 1940-12-10 | 0 | Details |
| US2224769A | Tabulating machine | Expired / Lapsed | 1935-12-12 | 1940-12-10 | 0 | Details |
| US2220489A | Sensing device | Expired / Lapsed | 1936-12-01 | 1940-11-05 | 0 | Details |
| US2219737A | Calculating machine | Expired / Lapsed | 1937-06-09 | 1940-10-29 | 0 | Details |
| US2217161A | Signaling system | Expired / Lapsed | 1939-01-14 | 1940-10-08 | 0 | Details |
| US2213565A | Multiplying machine | Expired / Lapsed | 1937-09-10 | 1940-09-03 | 0 | Details |
| US2211847A | Photographic recording machine | Expired / Lapsed | 1932-12-12 | 1940-08-20 | 0 | Details |
| US2210575A | Signaling system | Expired / Lapsed | 1938-09-16 | 1940-08-06 | 0 | Details |
| US2210574A | Signaling system | Expired / Lapsed | 1938-09-16 | 1940-08-06 | 0 | Details |
| US2210577A | Signaling system | Expired / Lapsed | 1938-09-16 | 1940-08-06 | 0 | Details |
| US2210576A | Signaling system | Expired / Lapsed | 1938-09-16 | 1940-08-06 | 0 | Details |
| US2209395A | Signaling system | Expired / Lapsed | 1937-12-21 | 1940-07-30 | 0 | Details |
| US2206662A | Fabricating article of beryllium copper | Expired / Lapsed | 1938-02-01 | 1940-07-02 | 0 | Details |
| US2206660A | Counting device | Expired / Lapsed | 1937-04-15 | 1940-07-02 | 0 | Details |
| US2203000A | Machine for reading perforated record cards | Expired / Lapsed | 1938-12-13 | 1940-06-04 | 0 | Details |
| US2199560A | Electric plug | Expired / Lapsed | 1937-11-13 | 1940-05-07 | 0 | Details |
| US2199541A | Data transcribing machine | Expired / Lapsed | 1937-03-30 | 1940-05-07 | 0 | Details |
| US2199537A | Multiplying machine | Expired / Lapsed | 1936-05-06 | 1940-05-07 | 0 | Details |
| US2199547A | Record perforating device | Expired / Lapsed | 1932-07-02 | 1940-05-07 | 0 | Details |
| US2196166A | Data reproducing machine | Expired / Lapsed | 1939-06-30 | 1940-04-02 | 0 | Details |
| US2192612A | Multiplying machine | Expired / Lapsed | 1937-09-24 | 1940-03-05 | 0 | Details |
| US2192599A | Multiplying machine | Expired / Lapsed | 1936-05-27 | 1940-03-05 | 0 | Details |
| US2189046A | Printing mechanism | Expired / Lapsed | 1937-09-15 | 1940-02-06 | 0 | Details |
| US2185697A | Multiplying machine | Expired / Lapsed | 1937-06-17 | 1940-01-02 | 0 | Details |
| US2181999A | Printing mechanism | Expired / Lapsed | 1936-06-12 | 1939-12-05 | 0 | Details |
| US2178064A | Sliding scale multiplying machine | Expired / Lapsed | 1932-07-12 | 1939-10-31 | 0 | Details |
| US2172330A | Selective film printer | Expired / Lapsed | 1937-01-21 | 1939-09-05 | 0 | Details |
| US2172078A | Accounting machine | Expired / Lapsed | 1933-12-02 | 1939-09-05 | 0 | Details |
| US2170543A | Key punch multiplying machine | Expired / Lapsed | 1932-10-04 | 1939-08-22 | 0 | Details |
| US2168460A | Signaling system | Expired / Lapsed | 1935-08-17 | 1939-08-08 | 0 | Details |
| US2166928A | Multiplying machine | Expired / Lapsed | 1934-05-10 | 1939-07-25 | 0 | Details |
| US2165237A | Communication system | Expired / Lapsed | 1936-12-23 | 1939-07-11 | 0 | Details |
| US2165230A | Multiplying machine | Expired / Lapsed | 1935-06-04 | 1939-07-11 | 0 | Details |
| US2161598A | Card sensing device | Expired / Lapsed | 1936-12-23 | 1939-06-06 | 0 | Details |
| US2157035A | Printing mechanism | Expired / Lapsed | 1936-09-05 | 1939-05-02 | 0 | Details |
| US2156969A | Tabulating machine | Expired / Lapsed | 1933-10-25 | 1939-05-02 | 0 | Details |
| US2153202A | Electrical filter | Expired / Lapsed | 1934-08-17 | 1939-04-04 | 0 | Details |
| US2150241A | Communication system | Expired / Lapsed | 1935-02-23 | 1939-03-14 | 0 | Details |
| US2150240A | Communication system | Expired / Lapsed | 1934-12-31 | 1939-03-14 | 0 | Details |
| US2150256A | Record controlled statistical machine | Expired / Lapsed | 1932-04-06 | 1939-03-14 | 0 | Details |
| US2141598A | Automatic decimal point selecting device for accounting mac… | Expired / Lapsed | 1934-05-04 | 1938-12-27 | 0 | Details |
| US2131908A | Multiplying machine | Expired / Lapsed | 1932-12-20 | 1938-10-04 | 0 | Details |
| US2131226A | Tabulating machine | Expired / Lapsed | 1934-06-07 | 1938-09-27 | 0 | Details |
| US2126640A | Record punch | Expired / Lapsed | 1937-04-24 | 1938-08-09 | 0 | Details |
| US2126666A | Multiplying machine | Expired / Lapsed | 1935-11-14 | 1938-08-09 | 0 | Details |
| US2124906A | Statistical machine | Expired / Lapsed | 1938-06-04 | 1938-07-26 | 0 | Details |
| US2120228A | Accounting machine | Expired / Lapsed | 1933-02-01 | 1938-06-14 | 0 | Details |
| US2116731A | Coding and decoding machine | Expired / Lapsed | 1936-08-27 | 1938-05-10 | 0 | Details |
| US2116653A | Tabulating and accounting machine | Expired / Lapsed | 1930-02-05 | 1938-05-10 | 0 | Details |
| US2110854A | Department store machine | Expired / Lapsed | 1935-12-04 | 1938-03-15 | 0 | Details |
| US2111118A | Plugboard | Expired / Lapsed | 1935-03-09 | 1938-03-15 | 0 | Details |
| US2111154A | Printing telegraph system | Expired / Lapsed | 1934-10-27 | 1938-03-15 | 0 | Details |
| US2111117A | Perforated record controlled machine | Expired / Lapsed | 1934-03-20 | 1938-03-15 | 0 | Details |
| US2104544A | Image transmission system | Expired / Lapsed | 1935-03-19 | 1938-01-04 | 0 | Details |
| US2101435A | Record controlled printing mechanism | Expired / Lapsed | 1934-12-28 | 1937-12-07 | 0 | Details |
| US2093529A | Tabulating machine | Expired / Lapsed | 1932-10-11 | 1937-09-21 | 0 | Details |
| US2089309A | Sound recording and reproducing machine | Expired / Lapsed | 1933-12-30 | 1937-08-10 | 0 | Details |
| US2079440A | Communication system | Expired / Lapsed | 1935-02-09 | 1937-05-04 | 0 | Details |
| US2079429A | Device for interpreting punched cards | Expired / Lapsed | 1930-12-05 | 1937-05-04 | 0 | Details |
| US2074037A | Automatic self-synchronized transmitting system | Expired / Lapsed | 1933-08-30 | 1937-03-16 | 0 | Details |
| US2072447A | Tabulating machine | Expired / Lapsed | 1931-10-02 | 1937-03-02 | 0 | Details |
| US2066763A | Material controlling scale | Expired / Lapsed | 1934-06-09 | 1937-01-05 | 0 | Details |
| US2066750A | Card tabulating machine | Expired / Lapsed | 1931-03-28 | 1937-01-05 | 0 | Details |
| US2063486A | Tabulating machine | Expired / Lapsed | 1933-03-30 | 1936-12-08 | 0 | Details |
| US2062119A | Successive discount accounting machine | Expired / Lapsed | 1932-10-15 | 1936-11-24 | 0 | Details |
| US2056391A | Printing mechanism | Expired / Lapsed | 1934-08-14 | 1936-10-06 | 0 | Details |
| US2046005A | Automatic scale | Expired / Lapsed | 1932-11-18 | 1936-06-30 | 0 | Details |
| US2041880A | Card for statistical machines and method for manufacturing … | Expired / Lapsed | 1932-03-26 | 1936-05-26 | 0 | Details |
| US2036027A | Printing mechanism | Expired / Lapsed | 1934-05-02 | 1936-03-31 | 0 | Details |
| US2036016A | Printing mechanism | Expired / Lapsed | 1934-02-23 | 1936-03-31 | 0 | Details |
| US2036014A | Printing scale | Expired / Lapsed | 1931-02-28 | 1936-03-31 | 0 | Details |
| US2030432A | Punching mechanism | Expired / Lapsed | 1934-03-24 | 1936-02-11 | 0 | Details |
| US2019869A | Perforated record controlled machine | Expired / Lapsed | 1934-03-28 | 1935-11-05 | 0 | Details |
| US2019864A | Communication system | Expired / Lapsed | 1934-02-23 | 1935-11-05 | 0 | Details |
| US2019863A | Tabulating machine | Expired / Lapsed | 1932-07-29 | 1935-11-05 | 0 | Details |
| US2013543A | Perforating machine | Expired / Lapsed | 1934-07-05 | 1935-09-03 | 0 | Details |
| US2013533A | Printing mechanism | Expired / Lapsed | 1931-07-10 | 1935-09-03 | 0 | Details |
| US2010642A | Accounting machine | Expired / Lapsed | 1930-01-07 | 1935-08-06 | 0 | Details |
| US2000404A | Sorting machine | Expired / Lapsed | 1932-01-16 | 1935-05-07 | 0 | Details |
| US2000403A | Method of and means for analyzing record cards | Expired / Lapsed | 1927-07-01 | 1935-05-07 | 0 | Details |
| US1997167A | Printing mechanism | Expired / Lapsed | 1933-10-07 | 1935-04-09 | 0 | Details |
| US1997157A | Card controlled machine | Expired / Lapsed | 1932-02-18 | 1935-04-09 | 0 | Details |
| US1982020A | Tabulating machine | Expired / Lapsed | 1931-11-10 | 1934-11-27 | 0 | Details |
| US1978931A | Tabulating machine | Expired / Lapsed | 1930-10-30 | 1934-10-30 | 0 | Details |
| US1976617A | Tabulating machine | Expired / Lapsed | 1933-05-23 | 1934-10-09 | 0 | Details |
| US1972977A | Tabulating machine | Expired / Lapsed | 1929-07-18 | 1934-09-11 | 0 | Details |
| US1965974A | Counter control | Expired / Lapsed | 1926-11-18 | 1934-07-10 | 0 | Details |
| US1962731A | Sorting machine | Expired / Lapsed | 1933-01-19 | 1934-06-12 | 0 | Details |
| US1957167A | Coupon ticket printing machine | Expired / Lapsed | 1933-02-20 | 1934-05-01 | 0 | Details |
| US1506382A | Record sheet and apparatus controlled thereby | Expired / Lapsed | 1922-06-07 | 1924-08-26 | 0 | Details |