US Philips Corp
US PhilipsActive Patents
0
Total Holdings
245
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US5161886C1 | Method for the perspective display of a part of a topograph… | Expired / Lapsed | 1991-11-18 | 2001-10-30 | 0 | Details |
| US5559901A | Method and device for determining a contour in a space of i… | Expired / Lapsed | 1994-06-28 | 1996-09-24 | 22 | Details |
| US5453929A | Control system with driver monitor | Expired / Lapsed | 1992-12-04 | 1995-09-26 | 18 | Details |
| US5161886A | Method for the perspective display of a part of a topograph… | Expired / Lapsed | 1991-11-18 | 1992-11-10 | 22 | Details |
| US5068846A | Reflective optical record carrier | Expired / Lapsed | 1988-04-23 | 1991-11-26 | 10 | Details |
| US4940636A | Optical interference filter | Expired / Lapsed | 1988-07-21 | 1990-07-10 | 9 | Details |
| US4893298A | Record-carrier body provided with a relief structure of opt… | Expired / Lapsed | 1985-05-17 | 1990-01-09 | 10 | Details |
| US4847834A | Local area network | Expired / Lapsed | 1988-01-07 | 1989-07-11 | 10 | Details |
| US4677981A | Device for the examination of objects by ultrasonic echogra… | Expired / Lapsed | 1985-09-20 | 1987-07-07 | 2 | Details |
| US4661944A | Optical recording/playback apparatus having a focusing cont… | Expired / Lapsed | 1984-06-11 | 1987-04-28 | 9 | Details |
| US4626680A | Pressure sensor whose optical system moves in response to m… | Expired / Lapsed | 1984-03-07 | 1986-12-02 | 11 | Details |
| US4525417A | Carbon-containing sliding layer | Expired / Lapsed | 1983-02-24 | 1985-06-25 | 13 | Details |
| US4486896A | X-Ray generator incorporating automatic correction of a dos… | Expired / Lapsed | 1982-08-09 | 1984-12-04 | 8 | Details |
| US4425043A | Device for detecting the position of an object | Expired / Lapsed | 1981-07-13 | 1984-01-10 | 9 | Details |
| US4398289A | Method for the transmission of data packets | Expired / Lapsed | 1981-02-17 | 1983-08-09 | 3 | Details |
| US4388539A | Integrated circuit comprising a plurality of voltage-curren… | Expired / Lapsed | 1981-02-13 | 1983-06-14 | 4 | Details |
| US4356422A | Acoustic transducer | Expired / Lapsed | 1980-06-02 | 1982-10-26 | 12 | Details |
| US4354157A | Method of and device for determining a nuclear spin density… | Expired / Lapsed | 1980-06-24 | 1982-10-12 | 8 | Details |
| US4353112A | Switched-mode voltage converter | Expired / Lapsed | 1979-09-04 | 1982-10-05 | 30 | Details |
| US4350998A | Device for differential image determination | Expired / Lapsed | 1980-07-02 | 1982-09-21 | 6 | Details |
| US4330880A | Apparatus for optically reading a disc-shaped record carrie… | Expired / Lapsed | 1980-06-27 | 1982-05-18 | 9 | Details |
| US4320423A | Apparatus for automatic repeated reproduction of sound on s… | Expired / Lapsed | 1978-10-23 | 1982-03-16 | 21 | Details |
| US4290075A | Optical recording device having several ablative recording … | Expired / Lapsed | 1979-07-16 | 1981-09-15 | 12 | Details |
| US4275405A | Semiconductor timing device with radioactive material at th… | Expired / Lapsed | 1976-11-16 | 1981-06-23 | 14 | Details |
| US4272776A | Semiconductor device and method of manufacturing same | Expired / Lapsed | 1972-05-18 | 1981-06-09 | 37 | Details |
| US4236232A | Optical read apparatus for reading a disc-shaped record car… | Expired / Lapsed | 1979-01-31 | 1980-11-25 | 7 | Details |
| US4227532A | Device for crushing calculi in the urinary bladder | Expired / Lapsed | 1978-04-03 | 1980-10-14 | 2 | Details |
| US4204253A | Device for generating and correcting a user program | Expired / Lapsed | 1978-03-20 | 1980-05-20 | 6 | Details |
| US4160269A | Apparatus for optically reading a phase-modulated optical r… | Expired / Lapsed | 1977-05-27 | 1979-07-03 | 16 | Details |
| US4147927A | Self-regulating heating element | Expired / Lapsed | 1976-04-05 | 1979-04-03 | 4 | Details |
| US4142196A | Polychromatic monolithic semiconductor assembly | Expired / Lapsed | 1977-12-19 | 1979-02-27 | 9 | Details |
| US4136388A | Data acquisition system for computed tomography | Expired / Lapsed | 1977-08-26 | 1979-01-23 | 18 | Details |
| US4134134A | Apparatus for picture processing | Expired / Lapsed | 1977-06-08 | 1979-01-09 | 13 | Details |
| US4118099A | Image coding and decoding using coherent codes | Expired / Lapsed | 1976-08-05 | 1978-10-03 | 8 | Details |
| US4064540A | Time registration arrangement provided with a television ca… | Expired / Lapsed | 1976-06-09 | 1977-12-20 | 6 | Details |
| US4057063A | Device for sterilization by transuterine tube coagulation | Expired / Lapsed | 1976-02-27 | 1977-11-08 | 7 | Details |
| US4051377A | Scanning x-ray examination apparatus | Expired / Lapsed | 1975-12-18 | 1977-09-27 | 10 | Details |
| US4047159A | Data transmission systems | Expired / Lapsed | 1975-07-08 | 1977-09-06 | 12 | Details |
| US4040053A | Transponder system for the transfer of signalling informati… | Expired / Lapsed | 1975-08-18 | 1977-08-02 | 4 | Details |
| US4037252A | Apparatus for reading a disc-shaped record carrier with plu… | Expired / Lapsed | 1975-10-17 | 1977-07-19 | 15 | Details |
| US4034344A | Character thinning apparatus | Expired / Lapsed | 1975-11-03 | 1977-07-05 | 5 | Details |
| US4030811A | Device for coupling a light source to an optical fiber | Expired / Lapsed | 1976-04-09 | 1977-06-21 | 7 | Details |
| US4019197A | Semiconductor floating gate storage device with lateral ele… | Expired / Lapsed | 1975-12-04 | 1977-04-19 | 10 | Details |
| US4011008A | Display device comprising a layer of liquid crystal | Expired / Lapsed | 1974-04-12 | 1977-03-08 | 5 | Details |
| US4010317A | Apparatus for reading a record carrier in which information… | Expired / Lapsed | 1975-04-16 | 1977-03-01 | 9 | Details |
| US4006430A | Circuit arrangement for converting a bridge unbalance into … | Expired / Lapsed | 1975-07-08 | 1977-02-01 | 17 | Details |
| US4004247A | Voltage-current converter | Expired / Lapsed | 1975-06-11 | 1977-01-18 | 5 | Details |
| US3999009A | Apparatus for playing a transparent optically encoded multi… | Expired / Lapsed | 1975-02-05 | 1976-12-21 | 8 | Details |
| US3995630A | Injection syringe with telescopic assembly between cartridg… | Expired / Lapsed | 1975-08-22 | 1976-12-07 | 4 | Details |
| US3988606A | Digital filter device for processing binary-coded signal sa… | Expired / Lapsed | 1975-05-30 | 1976-10-26 | 11 | Details |
| US3978837A | Device for automatic speed control of a diesel engine | Expired / Lapsed | 1974-12-06 | 1976-09-07 | 10 | Details |
| US3973199A | Prediction differential pulse code modulation system with a… | Expired / Lapsed | 1974-08-29 | 1976-08-03 | 13 | Details |
| US3973235A | Device for the detection of an acoustic image | Expired / Lapsed | 1974-04-15 | 1976-08-03 | 12 | Details |
| US3967628A | Skin electrode | Expired / Lapsed | 1975-02-03 | 1976-07-06 | 5 | Details |
| US3940737A | Method of and device for skeletonizing characters | Expired / Lapsed | 1973-01-22 | 1976-02-24 | 7 | Details |
| US3933046A | Logarithmic resistance-to-frequency converter | Expired / Lapsed | 1973-02-15 | 1976-01-20 | 11 | Details |
| US3931457A | Information carrier having addressed information tracks | Expired / Lapsed | 1973-03-26 | 1976-01-06 | 7 | Details |
| US3927327A | Exchange mechanism for film plates in an X-ray recording or… | Expired / Lapsed | 1974-03-18 | 1975-12-16 | 5 | Details |
| US3927373A | Paging system | Expired / Lapsed | 1973-11-20 | 1975-12-16 | 3 | Details |
| US3914683A | Current stabilizing arrangement with resistive-type current… | Expired / Lapsed | 1974-03-18 | 1975-10-21 | 20 | Details |
| US3913588A | Heart difibrillator with independently operating starting p… | Expired / Lapsed | 1971-03-25 | 1975-10-21 | 4 | Details |
| US3899771A | Method of character recognition by linear traverse employin… | Expired / Lapsed | 1974-06-17 | 1975-08-12 | 16 | Details |
| US3888548A | Anti-lock vehicle brake system | Expired / Lapsed | 1972-07-18 | 1975-06-10 | 13 | Details |
| US3878536A | Apparatus for improving the shape of characters formed by a… | Expired / Lapsed | 1972-07-10 | 1975-04-15 | 6 | Details |
| US3876842A | Apparatus for reading a flat record carrier | Expired / Lapsed | 1973-03-28 | 1975-04-08 | 4 | Details |
| US3859597A | System for the transmission of signals by pulse code modula… | Expired / Lapsed | 1973-06-01 | 1975-01-07 | 5 | Details |
| US3855533A | System including a transmitter and a receiver for the trans… | Expired / Lapsed | 1973-06-01 | 1974-12-17 | 13 | Details |
| US3845385A | Circuit arrangement for converting a bridge unbalance into … | Expired / Lapsed | 1973-03-16 | 1974-10-29 | 14 | Details |
| US3840752A | Electronically programable switching system | Expired / Lapsed | 1973-05-16 | 1974-10-08 | 11 | Details |
| US3838379A | Pressure transducer for liquids or gases | Expired / Lapsed | 1973-01-08 | 1974-09-24 | 6 | Details |
| US3838342A | A switched frequency communications system with automatic p… | Expired / Lapsed | 1970-12-22 | 1974-09-24 | 5 | Details |
| US3831092A | Transmitter for the transmission of signals by pulse code m… | Expired / Lapsed | 1973-03-07 | 1974-08-20 | 8 | Details |
| US3830971A | Line standard converter for converting a television signal … | Expired / Lapsed | 1972-08-30 | 1974-08-20 | 8 | Details |
| US3825761A | X-ray apparatus for displaying in slow motion tissues which… | Expired / Lapsed | 1973-07-05 | 1974-07-23 | 3 | Details |
| US3824337A | Sensor for converting a physical pattern into an electrical… | Expired / Lapsed | 1973-07-20 | 1974-07-16 | 11 | Details |
| US3824570A | Magneto-optical transducer using bubble domains | Expired / Lapsed | 1973-03-12 | 1974-07-16 | 6 | Details |
| US3822467A | Method of manufacturing a semiconductor device having a pat… | Expired / Lapsed | 1973-04-25 | 1974-07-09 | 14 | Details |
| US3815605A | Device and holder therefor for inserting a hollow coupling … | Expired / Lapsed | 1972-05-11 | 1974-06-11 | 14 | Details |
| US3816600A | Method of manufacturing metal fluorides and metal fluoride … | Expired / Lapsed | 1971-09-24 | 1974-06-11 | 0 | Details |
| US3806810A | Reference signal generator for pulse code modulation | Expired / Lapsed | 1972-02-15 | 1974-04-23 | 9 | Details |
| US3798967A | Probe for measuring the flow of liquids | Expired / Lapsed | 1972-04-13 | 1974-03-26 | 10 | Details |
| US3787822A | Method of providing internal connections in a semiconductor… | Expired / Lapsed | 1972-04-13 | 1974-01-22 | 8 | Details |
| US3769555A | Electronic control device in particular for use in a variab… | Expired / Lapsed | 1972-02-04 | 1973-10-30 | 13 | Details |
| US3761879A | Bus transport system for selection information and data | Expired / Lapsed | 1972-05-08 | 1973-09-25 | 4 | Details |
| US3755001A | Method of making semiconductor devices with selective dopin… | Expired / Lapsed | 1971-07-08 | 1973-08-28 | 18 | Details |
| US3753005A | Integrated circuit comprising strip-like conductors | Expired / Lapsed | 1971-06-03 | 1973-08-14 | 10 | Details |
| US3751645A | Method of and device for the digital simulation of digital … | Expired / Lapsed | 1971-09-02 | 1973-08-07 | 4 | Details |
| US3747073A | Electrical display devices | Expired / Lapsed | 1972-03-16 | 1973-07-17 | 13 | Details |
| US3742948A | Hypodermic syringe with radially movable blocking elements | Expired / Lapsed | 1970-08-10 | 1973-07-03 | 5 | Details |
| US3739237A | Methods of manufacturing insulated gate field effect transi… | Expired / Lapsed | 1970-12-18 | 1973-06-12 | 13 | Details |
| US3735349A | Method of and device for preparing characters for recogniti… | Expired / Lapsed | 1971-11-09 | 1973-05-22 | 13 | Details |
| US3718843A | Compact semiconductor device for monolithic integrated circ… | Expired / Lapsed | 1971-07-08 | 1973-02-27 | 6 | Details |
| US3716780A | System for the accurate reproduction of pulse code modulati… | Expired / Lapsed | 1971-04-05 | 1973-02-13 | 0 | Details |
| US3707604A | Telecommunication system with time division multiplex | Expired / Lapsed | 1971-06-22 | 1972-12-26 | 6 | Details |
| US3701988A | Character display device for television monitor | Expired / Lapsed | 1969-02-14 | 1972-10-31 | 5 | Details |
| US3686661A | Glow discharge matrix display with improved addressing means | Expired / Lapsed | 1970-07-06 | 1972-08-22 | 18 | Details |
| US3683306A | Temperature compensated semiconductor resistor containing n… | Expired / Lapsed | 1969-10-28 | 1972-08-08 | 8 | Details |
| US3673566A | Use of a plurality of scanning directions for character cen… | Expired / Lapsed | 1970-05-05 | 1972-06-27 | 8 | Details |
| US3671106A | Optical multiplex filter system | Expired / Lapsed | 1970-09-08 | 1972-06-20 | 0 | Details |
| US3670715A | Device for measuring the flow of blood | Expired / Lapsed | 1970-02-11 | 1972-06-20 | 8 | Details |
| US3649831A | Device for determining the crystallographic directions in s… | Expired / Lapsed | 1969-06-23 | 1972-03-14 | 6 | Details |
| US3649886A | Semiconductor device having a semiconductor body of which a… | Expired / Lapsed | 1968-11-19 | 1972-03-14 | 10 | Details |
| US3643218A | Cyclic group processing with internal priority | Expired / Lapsed | 1970-01-29 | 1972-02-15 | 4 | Details |
| US3632883A | Telecommunication exchange with time division multiplex | Expired / Lapsed | 1969-07-02 | 1972-01-04 | 4 | Details |
| US3624474A | Series motor on-off speed control circuit having means for … | Expired / Lapsed | 1968-03-22 | 1971-11-30 | 20 | Details |
| US3614746A | Memory addressing device using arbitrary directed graph str… | Expired / Lapsed | 1969-10-22 | 1971-10-19 | 8 | Details |
| US3604263A | Device for measuring the flow intensity of circulating liqu… | Expired / Lapsed | 1969-01-28 | 1971-09-14 | 12 | Details |
| US3602641A | Dark current compensation circuit | Expired / Lapsed | 1969-09-24 | 1971-08-31 | 8 | Details |
| US3598904A | Method and device for changing a simultaneous television si… | Expired / Lapsed | 1968-07-17 | 1971-08-10 | 23 | Details |
| US3594780A | Digital to analog converter having capacitor charged by inp… | Expired / Lapsed | 1968-09-03 | 1971-07-20 | 12 | Details |
| US3589733A | Apparatus for changing and playing back recorder tape magaz… | Expired / Lapsed | 1968-05-29 | 1971-06-29 | 28 | Details |
| US3590166A | Method of automatically establishing telephone connection t… | Expired / Lapsed | 1968-04-15 | 1971-06-29 | 2 | Details |
| US3586416A | Light modulator by gated interferometry | Expired / Lapsed | 1968-07-18 | 1971-06-22 | 12 | Details |
| US3581733A | Heart catheterization device | Expired / Lapsed | 1968-12-11 | 1971-06-01 | 5 | Details |
| US3577772A | Device for diagnostic examination by ultrasonic oscillations | Expired / Lapsed | 1967-05-08 | 1971-05-04 | 9 | Details |
| US3560977A | Aerial follower device | Expired / Lapsed | 1969-04-03 | 1971-02-02 | 0 | Details |
| US3543583A | Circuit arrangement for connecting devices for picking up m… | Expired / Lapsed | 1968-06-11 | 1970-12-01 | 0 | Details |
| US3544858A | Insulated gate field-effect transistor comprising a mesa ch… | Expired / Lapsed | 1968-05-08 | 1970-12-01 | 0 | Details |
| US3538417A | Bridge type frequency converter | Expired / Lapsed | 1968-03-05 | 1970-11-03 | 0 | Details |
| US3535698A | Apparatus for adjusting a clock pulse generator with respec… | Expired / Lapsed | 1967-12-05 | 1970-10-20 | 0 | Details |
| US3529154A | Electron beam apparatus having means to selectively utilize… | Expired / Lapsed | 1967-08-11 | 1970-09-15 | 0 | Details |
| US3516007A | Stepwise adjustable phase controlled oscillator loop | Expired / Lapsed | 1968-01-30 | 1970-06-02 | 0 | Details |
| US3499977A | Dual magnet head arrangement electrically connected togethe… | Expired / Lapsed | 1966-10-17 | 1970-03-10 | 0 | Details |
| US3497759A | Image intensifiers | Expired / Lapsed | 1968-05-14 | 1970-02-24 | 0 | Details |
| US3487258A | Image intensifier with channel secondary emission electron … | Expired / Lapsed | 1968-02-20 | 1969-12-30 | 0 | Details |
| US3484276A | Apparatus for and method of providing a melted insulating c… | Expired / Lapsed | 1966-07-21 | 1969-12-16 | 0 | Details |
| US3456200A | Frequency divider having a first decade with an adjustable … | Expired / Lapsed | 1966-02-09 | 1969-07-15 | 0 | Details |
| US3449510A | Circuit arrangement for producing a dissymmetrical switchin… | Expired / Lapsed | 1965-09-16 | 1969-06-10 | 0 | Details |
| US3441667A | Radiographic display device with areas of interest set off … | Expired / Lapsed | 1965-07-26 | 1969-04-29 | 0 | Details |
| US3439919A | Recording and/or play-back apparatus employing a record car… | Expired / Lapsed | 1966-07-11 | 1969-04-22 | 0 | Details |
| US3440353A | Radio-transmission system | Expired / Lapsed | 1965-06-18 | 1969-04-22 | 0 | Details |
| US3416008A | Storage circuit employing cross-connected opposite conducti… | Expired / Lapsed | 1964-09-29 | 1968-12-10 | 0 | Details |
| US3409875A | Transmission system for transmitting pulses | Expired / Lapsed | 1965-03-04 | 1968-11-05 | 0 | Details |
| US3398351A | High voltage rectifier assembly having tubular capacitor co… | Expired / Lapsed | 1965-05-24 | 1968-08-20 | 0 | Details |
| US3394898A | Magazine loading mechanism for a tape recorder | Expired / Lapsed | 1966-07-20 | 1968-07-30 | 0 | Details |
| US3387226A | Laser comprising a block of insulating material having a ch… | Expired / Lapsed | 1963-07-15 | 1968-06-04 | 2 | Details |
| US3381288A | Apparatus for the remote indication of the position of a ro… | Expired / Lapsed | 1963-03-21 | 1968-04-30 | 1 | Details |
| US3376083A | Axial bearing | Expired / Lapsed | 1966-03-01 | 1968-04-02 | 0 | Details |
| US3365666A | Transmission channel switching device responsive to channel… | Expired / Lapsed | 1965-07-12 | 1968-01-23 | 0 | Details |
| US3348074A | Photosensitive semiconductor device employing induced space… | Expired / Lapsed | 1965-06-30 | 1967-10-17 | 2 | Details |
| US3343254A | Method of narrowly spacing electrically conductive layers | Expired / Lapsed | 1964-02-20 | 1967-09-26 | 2 | Details |
| US3333209A | Oscillator system for controlling the frequency of an oscil… | Expired / Lapsed | 1964-12-21 | 1967-07-25 | 1 | Details |
| US3333105A | Device of the kind in which the distance of an object from … | Expired / Lapsed | 1964-04-23 | 1967-07-25 | 2 | Details |
| US3327375A | Apparatus for inserting components into a circuit board | Expired / Lapsed | 1965-07-15 | 1967-06-27 | 2 | Details |
| US3314773A | Low temperature system | Expired / Lapsed | 1965-11-30 | 1967-04-18 | 2 | Details |
| US3314594A | Apparatus for compressing or expanding a medium, which appa… | Expired / Lapsed | 1964-09-30 | 1967-04-18 | 2 | Details |
| US3311442A | Pulse transmission system employing quadrature modulation a… | Expired / Lapsed | 1963-02-05 | 1967-03-28 | 2 | Details |
| US3307171A | Apparatus for energizing an electrical load device | Expired / Lapsed | 1963-06-20 | 1967-02-28 | 2 | Details |
| US3305639A | Arrangement for scanning a set of apparatuses partitioned i… | Expired / Lapsed | 1963-05-03 | 1967-02-21 | 2 | Details |
| US3296511A | Arrangement for the reproduction of ultrasonic oscillations | Expired / Lapsed | 1963-09-11 | 1967-01-03 | 2 | Details |
| US3293377A | Device for reducing tape friction in a video tape recorder | Expired / Lapsed | 1963-04-08 | 1966-12-20 | 2 | Details |
| US3268733A | Photoelectrically controlled sawtooth wave oscillator | Expired / Lapsed | 1963-11-04 | 1966-08-23 | 2 | Details |
| US3268866A | Circuit arrangement for controlling switching matrices | Expired / Lapsed | 1961-03-22 | 1966-08-23 | 2 | Details |
| US3249911A | Method and device for determining the position of sound sou… | Expired / Lapsed | 1963-08-26 | 1966-05-03 | 2 | Details |
| US3249937A | Device for regulating the frequency of an oscillator substa… | Expired / Lapsed | 1963-08-06 | 1966-05-03 | 2 | Details |
| US3247459A | Plural laser amplifiers in tandem | Expired / Lapsed | 1964-05-01 | 1966-04-19 | 2 | Details |
| US3247456A | Directional electric tachometer including means for produci… | Expired / Lapsed | 1962-06-28 | 1966-04-19 | 2 | Details |
| US3238503A | Frequency responsive signalling system employing selective … | Expired / Lapsed | 1960-02-23 | 1966-03-01 | 2 | Details |
| US3235733A | Photosensitive radiation tracker using plural prisms | Expired / Lapsed | 1961-07-10 | 1966-02-15 | 1 | Details |
| US3230957A | High frequency therapeutic apparatus | Expired / Lapsed | 1961-02-20 | 1966-01-25 | 2 | Details |
| US3228230A | Integrator with automatic compensation of the variation of … | Expired / Lapsed | 1962-01-04 | 1966-01-11 | 2 | Details |
| US3229256A | Device for automatic ascertainment of an interruption in a … | Expired / Lapsed | 1961-02-03 | 1966-01-11 | 2 | Details |
| US3225258A | High tension direct current generator with circuit elements… | Expired / Lapsed | 1962-12-06 | 1965-12-21 | 2 | Details |
| US3223907A | Apparatus for the production of ultrasonic oscillations | Expired / Lapsed | 1962-10-01 | 1965-12-14 | 1 | Details |
| US3221283A | Pressure-measuring boxes | Expired / Lapsed | 1961-09-18 | 1965-11-30 | 2 | Details |
| US3204858A | Piston cylinder means with fluid-coupled drive means and ro… | Expired / Lapsed | 1963-06-21 | 1965-09-07 | 2 | Details |
| US3204241A | Radio navigation apparatus | Expired / Lapsed | 1963-02-25 | 1965-08-31 | 2 | Details |
| US3187164A | Device for the protection of electrical apparatus | Expired / Lapsed | 1962-12-05 | 1965-06-01 | 1 | Details |
| US3181033A | Overvoltage protection circuit | Expired / Lapsed | 1961-11-15 | 1965-04-27 | 2 | Details |
| US3179780A | Device for heating deep-frozen eatables with the aid of mic… | Expired / Lapsed | 1961-11-03 | 1965-04-20 | 2 | Details |
| US3165684A | Stepping motor with bistable triggering | Expired / Lapsed | 1961-07-03 | 1965-01-12 | 2 | Details |
| US3163489A | Electrothermal printing or recording apparatus | Expired / Lapsed | 1962-07-09 | 1964-12-29 | 2 | Details |
| US3152223A | Magnetic recording of video signals with means for providin… | Expired / Lapsed | 1962-05-10 | 1964-10-06 | 0 | Details |
| US3142987A | Semiconductor thermometer | Expired / Lapsed | 1962-08-13 | 1964-08-04 | 1 | Details |
| US3140977A | Fungicidal compositions containing triphenyl compounds | Expired / Lapsed | 1961-05-15 | 1964-07-14 | 2 | Details |
| US3133711A | Magnetic tape dictating machine | Expired / Lapsed | 1962-03-29 | 1964-05-19 | 2 | Details |
| US3131310A | Transistor circuit for generating narrow pulses | Expired / Lapsed | 1960-05-16 | 1964-04-28 | 2 | Details |
| US3119982A | Receiver circuits for selective calling | Expired / Lapsed | 1959-07-28 | 1964-01-28 | 2 | Details |
| US3097999A | Organo-tin compositions and method for treating plants | Expired / Lapsed | 1962-04-12 | 1963-07-16 | 2 | Details |
| US3098216A | Transistor common-emitter gate circuit with inductive load | Expired / Lapsed | 1959-07-13 | 1963-07-16 | 2 | Details |
| US3087985A | Color pick-up tube with circuit for minimizing cross-talk | Expired / Lapsed | 1959-01-26 | 1963-04-30 | 2 | Details |
| US3088036A | Particle counting apparatus | Expired / Lapsed | 1957-05-27 | 1963-04-30 | 2 | Details |
| US3085980A | Ferromagnetic material | Expired / Lapsed | 1959-06-01 | 1963-04-16 | 2 | Details |
| US3081418A | Semi-conductor device | Expired / Lapsed | 1957-08-20 | 1963-03-12 | 2 | Details |
| US3065752A | High frequency therapeutic radiator | Expired / Lapsed | 1960-10-24 | 1962-11-27 | 0 | Details |
| US3049677A | Pulsing circuit using punch-through transistor | Expired / Lapsed | 1956-06-25 | 1962-08-14 | 0 | Details |
| US3024299A | Cold press bonded semi-conductor housing joint | Expired / Lapsed | 1958-03-26 | 1962-03-06 | 0 | Details |
| US3023890A | Container consisting of a crate box with detachable walls | Expired / Lapsed | 1957-09-30 | 1962-03-06 | 0 | Details |
| US3019977A | Parallel-operating synchronous digital computer capable of … | Expired / Lapsed | 1958-03-17 | 1962-02-06 | 0 | Details |
| US3020352A | Single sideband equipment for speech transmission | Expired / Lapsed | 1957-03-15 | 1962-02-06 | 0 | Details |
| US3006789A | Method of producing transistors | Expired / Lapsed | 1959-06-10 | 1961-10-31 | 2 | Details |
| US2999937A | X-ray apparatus | Expired / Lapsed | 1958-10-20 | 1961-09-12 | 0 | Details |
| US2991374A | Electrical memory system utilizing free charge storage | Expired / Lapsed | 1956-12-03 | 1961-07-04 | 0 | Details |
| US2973571A | Current conductor | Expired / Lapsed | 1954-08-26 | 1961-03-07 | 0 | Details |
| US2971251A | Semi-conductive device | Expired / Lapsed | 1955-06-20 | 1961-02-14 | 0 | Details |
| US2965843A | Timer arrangement | Expired / Lapsed | 1955-12-22 | 1960-12-20 | 0 | Details |
| US2956912A | Lead sulphide semi-conductive bodies and method of making s… | Expired / Lapsed | 1956-04-26 | 1960-10-18 | 1 | Details |
| US2951957A | Synchronous motor | Expired / Lapsed | 1957-11-22 | 1960-09-06 | 0 | Details |
| US2951995A | Circuit for controlling the resonance frequency of an oscil… | Expired / Lapsed | 1957-09-16 | 1960-09-06 | 0 | Details |
| US2948815A | Circuit arrangement comprising a phototransistor | Expired / Lapsed | 1956-01-23 | 1960-08-09 | 0 | Details |
| US2944166A | Bistable trigger circuit | Expired / Lapsed | 1957-09-19 | 1960-07-05 | 0 | Details |
| US2943480A | Arrangement for checking the zero constancy of wheatstone i… | Expired / Lapsed | 1956-11-21 | 1960-07-05 | 0 | Details |
| US2920259A | Direct current converter | Expired / Lapsed | 1956-11-28 | 1960-01-05 | 0 | Details |
| US2917684A | Semi-conductive electrode system | Expired / Lapsed | 1956-09-05 | 1959-12-15 | 2 | Details |
| US2912521A | Magnetic recording apparatus | Expired / Lapsed | 1957-07-29 | 1959-11-10 | 0 | Details |
| US2907880A | Circuit-arrangement for measuring voltages | Expired / Lapsed | 1956-03-21 | 1959-10-06 | 0 | Details |
| US2907834A | Magnetic reproducing head | Expired / Lapsed | 1955-10-12 | 1959-10-06 | 0 | Details |
| US2904690A | Device for determining the relative deviation in percent of… | Expired / Lapsed | 1955-12-22 | 1959-09-15 | 0 | Details |
| US2901543A | Radio system comprising a main station and a plurality of s… | Expired / Lapsed | 1955-06-07 | 1959-08-25 | 0 | Details |
| US2901598A | Radio-transmitter for frequency-shift telegraphy made opera… | Expired / Lapsed | 1954-05-05 | 1959-08-25 | 0 | Details |
| US2890403A | Transistor pulse generator | Expired / Lapsed | 1956-01-26 | 1959-06-09 | 0 | Details |
| US2887596A | Television camera tube | Expired / Lapsed | 1956-05-10 | 1959-05-19 | 2 | Details |
| US2882419A | Image reproducing device | Expired / Lapsed | 1956-08-20 | 1959-04-14 | 0 | Details |
| US2874370A | Device for recording and re-transmitting coded information | Expired / Lapsed | 1954-04-19 | 1959-02-17 | 0 | Details |
| US2874232A | Transistor element and transistor circuit | Expired / Lapsed | 1954-02-01 | 1959-02-17 | 0 | Details |
| US2870310A | Indicator circuit arrangement | Expired / Lapsed | 1955-12-12 | 1959-01-20 | 0 | Details |
| US2870345A | Amplification control of a transistor | Expired / Lapsed | 1955-01-03 | 1959-01-20 | 0 | Details |
| US2859562A | Metal glass seals and methods of making same | Expired / Lapsed | 1955-10-12 | 1958-11-11 | 0 | Details |
| US2854615A | Circuit arrangement for providing a d. c. output | Expired / Lapsed | 1956-01-16 | 1958-09-30 | 0 | Details |
| US2854614A | Transistor circuit arrangement having stabilized output vol… | Expired / Lapsed | 1955-10-10 | 1958-09-30 | 0 | Details |
| US2851591A | Selective calling wireless transmission system | Expired / Lapsed | 1953-02-09 | 1958-09-09 | 0 | Details |
| US2849664A | Semi-conductor diode | Expired / Lapsed | 1955-10-17 | 1958-08-26 | 2 | Details |
| US2846581A | Transistor pulse generator circuit | Expired / Lapsed | 1956-07-17 | 1958-08-05 | 0 | Details |
| US2846646A | Measuring or recording device | Expired / Lapsed | 1954-06-07 | 1958-08-05 | 0 | Details |
| US2843669A | Synchronized generator | Expired / Lapsed | 1954-10-26 | 1958-07-15 | 0 | Details |
| US2843804A | Device for supplying lighting panels | Expired / Lapsed | 1954-01-29 | 1958-07-15 | 0 | Details |
| US2838664A | Transistor counter circuit | Expired / Lapsed | 1954-07-14 | 1958-06-10 | 0 | Details |
| US2838617A | Circuit-arrangement comprising a four-zone transistor | Expired / Lapsed | 1953-12-22 | 1958-06-10 | 0 | Details |
| US2835805A | Circuit arrangement for decoding pulse code modulation acco… | Expired / Lapsed | 1953-12-14 | 1958-05-20 | 0 | Details |
| US2831114A | Transistor amplifier with bias stabilization | Expired / Lapsed | 1955-10-27 | 1958-04-15 | 0 | Details |
| US2829281A | Transistor switching circuit | Expired / Lapsed | 1955-09-08 | 1958-04-01 | 0 | Details |
| US2829231A | Device for automatic control of the temperature of an elect… | Expired / Lapsed | 1955-02-08 | 1958-04-01 | 0 | Details |
| US2827599A | Transistor | Expired / Lapsed | 1954-04-19 | 1958-03-18 | 2 | Details |
| US2822533A | Device for reading magnetically recorded memory elements | Expired / Lapsed | 1954-07-08 | 1958-02-04 | 0 | Details |
| US2820144A | Stabilized feedback oscillator | Expired / Lapsed | 1954-11-18 | 1958-01-14 | 0 | Details |
| US2820178A | Switching arrangement for switchingoff the ignition protect… | Expired / Lapsed | 1954-07-29 | 1958-01-14 | 0 | Details |
| US2809132A | Method of coating a support with a lead sulphide layer | Expired / Lapsed | 1956-04-25 | 1957-10-08 | 1 | Details |
| US2801298A | Series connected transistor amplifier | Expired / Lapsed | 1954-07-20 | 1957-07-30 | 0 | Details |
| US2791739A | Circuit arrangement for converting a lower d. c. voltage in… | Expired / Lapsed | 1955-05-20 | 1957-05-07 | 0 | Details |
| US2791697A | Particle counting apparatus | Expired / Lapsed | 1954-03-23 | 1957-05-07 | 0 | Details |
| US2791377A | Apparatus for counting particles | Expired / Lapsed | 1952-06-25 | 1957-05-07 | 0 | Details |
| US2791695A | Electrical counting apparatus | Expired / Lapsed | 1952-03-06 | 1957-05-07 | 0 | Details |
| US2727968A | Electric hygroscope | Expired / Lapsed | 1953-01-29 | 1955-12-20 | 2 | Details |
| US2700000A | Thermionic cathode and method of manufacturing same | Expired / Lapsed | 1952-02-27 | 1955-01-18 | 2 | Details |
| US2411298A | Piezoelectric crystal | Expired / Lapsed | 1945-02-12 | 1946-11-19 | 0 | Details |