Honeywell Inc
HoneywellActive Patents
0
Total Holdings
536
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| GB886421A | Improvements in or relating to data processing apparatus | Expired / Lapsed | 1958-01-24 | — | 0 | Details |
| US5394238A | Look-ahead windshear detector by filtered Rayleigh and/or a… | Expired / Lapsed | 1992-11-09 | 1995-02-28 | 23 | Details |
| US5036474A | Motion detection and tracking from a mobile platform | Expired / Lapsed | 1989-03-31 | 1991-07-30 | 10 | Details |
| US4985854A | Method for rapid generation of photo-realistic imagery | Expired / Lapsed | 1989-05-15 | 1991-01-15 | 5 | Details |
| US4972396A | Multiple independently positionable recording-reading head … | Expired / Lapsed | 1988-10-24 | 1990-11-20 | 21 | Details |
| US4968112A | Apparatus for providing depolarized light | Expired / Lapsed | 1990-01-04 | 1990-11-06 | 8 | Details |
| US4898565A | Direction sensing apparatus for data transmission cable con… | Expired / Lapsed | 1984-11-05 | 1990-02-06 | 12 | Details |
| US4855822A | Human engineered remote driving system | Expired / Lapsed | 1988-01-26 | 1989-08-08 | 15 | Details |
| US4593967A | 3-D active vision sensor | Expired / Lapsed | 1984-11-01 | 1986-06-10 | 26 | Details |
| US4533915A | Radar terrain signal suppressor | Expired / Lapsed | 1982-02-16 | 1985-08-06 | 7 | Details |
| US4487206A | Fiber optic pressure sensor with temperature compensation a… | Expired / Lapsed | 1982-10-13 | 1984-12-11 | 13 | Details |
| US4484189A | Memoryless artificial horizon generator | Expired / Lapsed | 1982-06-18 | 1984-11-20 | 13 | Details |
| US4410804A | Two dimensional image panel with range measurement capabili… | Expired / Lapsed | 1981-07-13 | 1983-10-18 | 7 | Details |
| US4303984A | Sensor output correction circuit | Expired / Lapsed | 1979-12-14 | 1981-12-01 | 14 | Details |
| US4240335A | Floating seal for fluidic devices | Expired / Lapsed | 1979-12-13 | 1980-12-23 | 19 | Details |
| US4229792A | Bus allocation synchronization system | Expired / Lapsed | 1979-04-09 | 1980-10-21 | 7 | Details |
| US4209840A | Data processing protocol system | Expired / Lapsed | 1978-06-28 | 1980-06-24 | 16 | Details |
| US4201446A | Fiber optic temperature sensor using liquid component fiber | Expired / Lapsed | 1978-10-20 | 1980-05-06 | 8 | Details |
| US4185191A | Range determination system | Expired / Lapsed | 1978-06-05 | 1980-01-22 | 12 | Details |
| US4149148A | Aircraft flight instrument display system | Expired / Lapsed | 1977-04-19 | 1979-04-10 | 24 | Details |
| US4141253A | Force transducing cantilever beam and pressure transducer i… | Expired / Lapsed | 1977-08-24 | 1979-02-27 | 32 | Details |
| US4141066A | Process control system with backup process controller | Expired / Lapsed | 1977-09-13 | 1979-02-20 | 13 | Details |
| US4136392A | Load cycling with space temperature feedback | Expired / Lapsed | 1976-10-29 | 1979-01-23 | 18 | Details |
| US4133027A | Process control system with backup process controller | Expired / Lapsed | 1977-09-13 | 1979-01-02 | 12 | Details |
| US4125820A | Stress sensor apparatus | Expired / Lapsed | 1976-09-20 | 1978-11-14 | 46 | Details |
| US4117722A | Measuring apparatus providing separate analog and digital o… | Expired / Lapsed | 1977-11-14 | 1978-10-03 | 14 | Details |
| US4094479A | Side slip angle command SCAS for aircraft | Expired / Lapsed | 1977-03-25 | 1978-06-13 | 9 | Details |
| US4044371A | Plurality of precise temperature resistors formed in monoli… | Expired / Lapsed | 1976-09-29 | 1977-08-23 | 7 | Details |
| US4041486A | Pulse stream identification circuit | Expired / Lapsed | 1975-11-10 | 1977-08-09 | 9 | Details |
| US4019172A | Central supervisory and control system generating 16-bit ou… | Expired / Lapsed | 1976-01-19 | 1977-04-19 | 23 | Details |
| US4016506A | Dielectric waveguide oscillator | Expired / Lapsed | 1975-12-24 | 1977-04-05 | 25 | Details |
| US4000643A | Apparatus for producing a compensating voltage | Expired / Lapsed | 1976-03-29 | 1977-01-04 | 12 | Details |
| US4001807A | Concurrent overview and detail display system having proces… | Expired / Lapsed | 1975-02-03 | 1977-01-04 | 14 | Details |
| US3979922A | Energy conservation air conditioning system | Expired / Lapsed | 1974-12-30 | 1976-09-14 | 21 | Details |
| US3968362A | Optical system for laser doppler homodyne detection | Expired / Lapsed | 1975-08-11 | 1976-07-06 | 41 | Details |
| US3956927A | Strain gauge transducer apparatus | Expired / Lapsed | 1975-09-29 | 1976-05-18 | 13 | Details |
| US3949607A | Enthalpy control apparatus for air conditioning | Expired / Lapsed | 1974-10-03 | 1976-04-13 | 8 | Details |
| US3919475A | Head attached television | Expired / Lapsed | 1974-10-09 | 1975-11-11 | 9 | Details |
| US3906219A | Focus detecting apparatus | Expired / Lapsed | 1973-10-09 | 1975-09-16 | 7 | Details |
| US3904870A | Focus detecting apparatus | Expired / Lapsed | 1973-10-09 | 1975-09-09 | 9 | Details |
| US3875401A | Focus detecting apparatus | Expired / Lapsed | 1973-07-09 | 1975-04-01 | 17 | Details |
| US3841150A | Strain gauge transducer signal conditioning circuitry | Expired / Lapsed | 1973-11-02 | 1974-10-15 | 10 | Details |
| US3842371A | Voltage to frequency converter | Expired / Lapsed | 1973-10-12 | 1974-10-15 | 10 | Details |
| US3831006A | Patient-specimen identification system using stored associa… | Expired / Lapsed | 1973-01-19 | 1974-08-20 | 31 | Details |
| US3816768A | Memory protecting circuit | Expired / Lapsed | 1972-08-16 | 1974-06-11 | 7 | Details |
| US3787888A | Recording apparatus with beam intensity control means | Expired / Lapsed | 1971-10-15 | 1974-01-22 | 9 | Details |
| US3785432A | Electronic control circuit with time delay of main and feed… | Expired / Lapsed | 1972-10-02 | 1974-01-15 | 9 | Details |
| US3757414A | Method for batch fabricating semiconductor devices | Expired / Lapsed | 1971-03-26 | 1973-09-11 | 19 | Details |
| US3757195A | Isolated two wire signal transmitter | Expired / Lapsed | 1972-08-11 | 1973-09-04 | 5 | Details |
| US3737861A | Input/output bus | Expired / Lapsed | 1970-04-01 | 1973-06-05 | 31 | Details |
| US3716096A | Temperature control and supervision system for a building a… | Expired / Lapsed | 1971-09-07 | 1973-02-13 | 4 | Details |
| US3705295A | Conversion system | Expired / Lapsed | 1971-02-08 | 1972-12-05 | 20 | Details |
| US3701145A | Analog to digital converter | Expired / Lapsed | 1970-11-04 | 1972-10-24 | 18 | Details |
| US3697953A | System for monitoring abnormal system operations in a syste… | Expired / Lapsed | 1970-12-28 | 1972-10-10 | 6 | Details |
| US3698007A | Central processor unit having simulative interpretation cap… | Expired / Lapsed | 1970-11-30 | 1972-10-10 | 11 | Details |
| US3685051A | Holographic imaging system using crossed linear arrays of e… | Expired / Lapsed | 1969-03-06 | 1972-08-15 | 14 | Details |
| US3678593A | Compass system and components therefor having automatic fie… | Expired / Lapsed | 1968-12-26 | 1972-07-25 | 4 | Details |
| US3648252A | Multiprogrammable, multiprocessor computer system | Expired / Lapsed | 1969-11-03 | 1972-03-07 | 29 | Details |
| US3641530A | System for displaying values of conditions reported at a ce… | Expired / Lapsed | 1970-07-13 | 1972-02-08 | 9 | Details |
| US3634883A | Microinstruction address modification and branch system | Expired / Lapsed | 1969-11-12 | 1972-01-11 | 22 | Details |
| US3633162A | Apparatus for correcting and indicating errors in redundant… | Expired / Lapsed | 1970-08-03 | 1972-01-04 | 19 | Details |
| US3633175A | Defect-tolerant digital memory system | Expired / Lapsed | 1969-05-15 | 1972-01-04 | 25 | Details |
| US3631352A | Midvalue signal selector | Expired / Lapsed | 1970-12-28 | 1971-12-28 | 10 | Details |
| US3628254A | Nonpendulous flux valve compass system | Expired / Lapsed | 1970-04-01 | 1971-12-21 | 15 | Details |
| US3626370A | Air-conditioning control system having display means to sho… | Expired / Lapsed | 1969-10-15 | 1971-12-07 | 3 | Details |
| US3624605A | Optical character recognition system and method | Expired / Lapsed | 1968-12-13 | 1971-11-30 | 16 | Details |
| US3622992A | Supervision and control apparatus with selective display | Expired / Lapsed | 1969-10-15 | 1971-11-23 | 9 | Details |
| US3602222A | Rate meter, particularly a beat-by-beat cardiotachometer | Expired / Lapsed | 1968-09-16 | 1971-08-31 | 10 | Details |
| US3597733A | Cable receiver | Expired / Lapsed | 1970-02-04 | 1971-08-03 | 12 | Details |
| US3596114A | Hall effect contactless switch with prebiased schmitt trigg… | Expired / Lapsed | 1969-11-25 | 1971-07-27 | 5 | Details |
| US3575589A | Error recovery apparatus and method | Expired / Lapsed | 1968-11-20 | 1971-04-20 | 22 | Details |
| US3574495A | Burner control system | Expired / Lapsed | 1969-12-11 | 1971-04-13 | 9 | Details |
| US3574496A | Direct spark igniter combustion safeguard apparatus | Expired / Lapsed | 1969-07-11 | 1971-04-13 | 11 | Details |
| US3568760A | Optimization system | Expired / Lapsed | 1969-03-18 | 1971-03-09 | 20 | Details |
| US3570006A | Multiple branch technique | Expired / Lapsed | 1968-01-02 | 1971-03-09 | 0 | Details |
| US3567115A | Zone temperature control system | Expired / Lapsed | 1969-05-19 | 1971-03-02 | 11 | Details |
| US3563458A | Condition control device | Expired / Lapsed | 1968-12-23 | 1971-02-16 | 10 | Details |
| US3564219A | Indicating device | Expired / Lapsed | 1968-06-07 | 1971-02-16 | 5 | Details |
| US3562729A | Two wire mv./v. transmitter | Expired / Lapsed | 1967-09-08 | 1971-02-09 | 0 | Details |
| US3559488A | Differential pressure measuring apparatus | Expired / Lapsed | 1969-08-20 | 1971-02-02 | 0 | Details |
| US3560933A | Microprogram control apparatus | Expired / Lapsed | 1968-01-02 | 1971-02-02 | 0 | Details |
| US3555251A | Optimizing system for a plurality of temperature conditioni… | Expired / Lapsed | 1967-12-06 | 1971-01-12 | 7 | Details |
| US3551885A | Validity apparatus for computer based process control equip… | Expired / Lapsed | 1968-01-18 | 1970-12-29 | 0 | Details |
| US3551699A | Control apparatus | Expired / Lapsed | 1967-07-10 | 1970-12-29 | 0 | Details |
| US3540525A | Pneumatic control apparatus | Expired / Lapsed | 1968-12-23 | 1970-11-17 | 0 | Details |
| US3534399A | Area navigation method and apparatus for aircraft with vhf-… | Expired / Lapsed | 1968-07-22 | 1970-10-13 | 0 | Details |
| US3534402A | Apparatus for determining the uniformity of web material | Expired / Lapsed | 1967-12-15 | 1970-10-13 | 0 | Details |
| US3522588A | Direct digital control interfacing circuitry | Expired / Lapsed | 1967-07-06 | 1970-08-04 | 0 | Details |
| US3519988A | Error checking arrangement for data processing apparatus | Expired / Lapsed | 1965-05-17 | 1970-07-07 | 0 | Details |
| US3518413A | Apparatus for checking the sequencing of a data processing … | Expired / Lapsed | 1968-03-21 | 1970-06-30 | 0 | Details |
| US3514637A | Control apparatus | Expired / Lapsed | 1967-12-27 | 1970-05-26 | 0 | Details |
| US3503005A | Ring laser which is biased to permit two equal intensity tr… | Expired / Lapsed | 1967-10-17 | 1970-03-24 | 0 | Details |
| US3500466A | Communication multiplexing apparatus | Expired / Lapsed | 1967-09-11 | 1970-03-10 | 0 | Details |
| US3500394A | Control apparatus | Expired / Lapsed | 1966-12-23 | 1970-03-10 | 0 | Details |
| US3495217A | Digital data transmission apparatus | Expired / Lapsed | 1966-12-19 | 1970-02-10 | 0 | Details |
| US3482922A | Solid-state control system | Expired / Lapsed | 1968-05-23 | 1969-12-09 | 0 | Details |
| US3482623A | Zone temperature control system | Expired / Lapsed | 1968-02-23 | 1969-12-09 | 0 | Details |
| US3479458A | Automatic channel equalization apparatus | Expired / Lapsed | 1967-03-06 | 1969-11-18 | 0 | Details |
| US3466605A | Alarm printer | Expired / Lapsed | 1967-11-28 | 1969-09-09 | 0 | Details |
| US3449722A | Electronic multiprocessing apparatus including common queue… | Expired / Lapsed | 1966-05-02 | 1969-06-10 | 0 | Details |
| US3441945A | Dual lifters for a recording pen | Expired / Lapsed | 1967-08-25 | 1969-04-29 | 0 | Details |
| US3438253A | Thermal device for measuring direction and velocity of flui… | Expired / Lapsed | 1966-11-15 | 1969-04-15 | 0 | Details |
| US3427442A | Process control apparatus | Expired / Lapsed | 1965-01-18 | 1969-02-11 | 0 | Details |
| US3426331A | Apparatus for monitoring the processing time of program ins… | Expired / Lapsed | 1966-12-12 | 1969-02-04 | 0 | Details |
| US3411849A | Frequency stabilized laser | Expired / Lapsed | 1965-05-13 | 1968-11-19 | 0 | Details |
| US3410779A | Measuring apparatus with pressure amplifier | Expired / Lapsed | 1965-04-01 | 1968-11-12 | 2 | Details |
| US3404962A | Apparatus for detecting a constituent in a mixture | Expired / Lapsed | 1964-10-22 | 1968-10-08 | 0 | Details |
| US3402330A | Semiconductor integrated circuit apparatus | Expired / Lapsed | 1966-05-16 | 1968-09-17 | 0 | Details |
| US3399849A | Lift and pitch control apparatus for aircraft | Expired / Lapsed | 1966-05-11 | 1968-09-03 | 0 | Details |
| US3399382A | Data transfer system | Expired / Lapsed | 1965-05-07 | 1968-08-27 | 0 | Details |
| US3391317A | Rebalanceable control apparatus having transient sensitivit… | Expired / Lapsed | 1965-04-12 | 1968-07-02 | 0 | Details |
| US3389328A | Control apparatus with soft start | Expired / Lapsed | 1966-08-22 | 1968-06-18 | 2 | Details |
| US3388383A | Information handling apparatus | Expired / Lapsed | 1965-07-13 | 1968-06-11 | 0 | Details |
| US3376512A | Semiconductor apparatus | Expired / Lapsed | 1965-03-11 | 1968-04-02 | 2 | Details |
| US3375375A | Orientation sensing means comprising photodetectors and pro… | Expired / Lapsed | 1965-01-08 | 1968-03-26 | 1 | Details |
| US3373650A | Laser angular rate sensor | Expired / Lapsed | 1965-04-02 | 1968-03-19 | 0 | Details |
| US3369221A | Information handling apparatus | Expired / Lapsed | 1964-05-04 | 1968-02-13 | 2 | Details |
| US3358149A | Optical correlator with endless grease belt recorder | Expired / Lapsed | 1964-08-17 | 1967-12-12 | 2 | Details |
| US3351911A | Interfacing system | Expired / Lapsed | 1964-08-18 | 1967-11-07 | 0 | Details |
| US3346727A | Justification of operands in an arithmetic unit | Expired / Lapsed | 1966-02-28 | 1967-10-10 | 2 | Details |
| US3346231A | Ambient compensated bimetal actuated valve | Expired / Lapsed | 1964-12-29 | 1967-10-10 | 2 | Details |
| US3337852A | Information handling apparatus | Expired / Lapsed | 1964-06-05 | 1967-08-22 | 2 | Details |
| US3336212A | Condition responsive device | Expired / Lapsed | 1964-09-01 | 1967-08-15 | 2 | Details |
| US3334282A | Plural channel control apparatus | Expired / Lapsed | 1963-09-30 | 1967-08-01 | 2 | Details |
| US3328606A | Scr bidirectional switch apparatus having variable impedanc… | Expired / Lapsed | 1964-11-02 | 1967-06-27 | 2 | Details |
| US3323411A | Apparatus for measuring angular velocity having phase and a… | Expired / Lapsed | 1964-06-29 | 1967-06-06 | 2 | Details |
| US3323110A | Information handling apparatus including freely assignable … | Expired / Lapsed | 1964-04-06 | 1967-05-30 | 2 | Details |
| US3314327A | Colorimeter employing tristimulus values | Expired / Lapsed | 1961-12-13 | 1967-04-18 | 2 | Details |
| US3313876A | Radar target signal generating apparatus | Expired / Lapsed | 1965-02-24 | 1967-04-11 | 1 | Details |
| US3310663A | Logarithmic digital process controller | Expired / Lapsed | 1963-05-21 | 1967-03-21 | 2 | Details |
| US3300696A | Tracer control apparatus with means to correct position err… | Expired / Lapsed | 1963-10-15 | 1967-01-24 | 2 | Details |
| US3292034A | Apparatus for synchronizing cathode ray deflection to a rot… | Expired / Lapsed | 1963-09-27 | 1966-12-13 | 1 | Details |
| US3288961A | Humidity control with positive switch actuation means | Expired / Lapsed | 1965-06-04 | 1966-11-29 | 2 | Details |
| US3283229A | Dual redundant, adaptive motor control with fail safe featu… | Expired / Lapsed | 1962-05-24 | 1966-11-01 | 2 | Details |
| US3275835A | Photosensitive accelerometer utilizing radiation pressure | Expired / Lapsed | 1964-01-27 | 1966-09-27 | 2 | Details |
| US3273128A | Frequency multiplexing circuit | Expired / Lapsed | 1962-12-31 | 1966-09-13 | 2 | Details |
| US3267429A | Digital to pulse comparator apparatus | Expired / Lapsed | 1963-09-16 | 1966-08-16 | 2 | Details |
| US3259819A | Control apparatus utilizing electromagnetic resolver | Expired / Lapsed | 1963-10-28 | 1966-07-05 | 2 | Details |
| US3258082A | Control apparatus for automatically steering a land vehicle | Expired / Lapsed | 1964-07-08 | 1966-06-28 | 2 | Details |
| US3256524A | Laser recording apparatus | Expired / Lapsed | 1963-11-29 | 1966-06-14 | 2 | Details |
| US3252110A | Laser end mirror alignment apparatus | Expired / Lapsed | 1962-12-27 | 1966-05-17 | 2 | Details |
| US3243609A | Semiconductor apparatus | Expired / Lapsed | 1964-07-24 | 1966-03-29 | 0 | Details |
| US3242489A | Radar tracking apparatus | Expired / Lapsed | 1964-03-04 | 1966-03-22 | 1 | Details |
| US3240602A | Control apparatus and photomechanical processes for produci… | Expired / Lapsed | 1961-07-18 | 1966-03-15 | 2 | Details |
| US3240920A | Data transmission verifier | Expired / Lapsed | 1961-05-29 | 1966-03-15 | 2 | Details |
| US3239673A | Photosensitive device for determining relative rotation | Expired / Lapsed | 1963-04-30 | 1966-03-08 | 2 | Details |
| US3239817A | Angle of rotation measuring apparatus | Expired / Lapsed | 1961-10-12 | 1966-03-08 | 2 | Details |
| US3239748A | Control apparatus | Expired / Lapsed | 1961-09-07 | 1966-03-08 | 0 | Details |
| US3236451A | Thermocouple indication and control apparatus | Expired / Lapsed | 1963-05-08 | 1966-02-22 | 2 | Details |
| CA727217A | Electrical apparatus | Expired / Lapsed | — | 1966-02-01 | 0 | Details |
| US3230763A | Semiconductor pressure diaphragm | Expired / Lapsed | 1962-12-27 | 1966-01-25 | 1 | Details |
| US3222531A | Solid state junction photopotentiometer | Expired / Lapsed | 1962-06-26 | 1965-12-07 | 1 | Details |
| US3218864A | Force ratio apparatus | Expired / Lapsed | 1962-08-07 | 1965-11-23 | 0 | Details |
| US3210548A | Semiconductor light position indicators and scanners | Expired / Lapsed | 1962-11-15 | 1965-10-05 | 1 | Details |
| US3204113A | Control apparatus employing a semiconductor device connecte… | Expired / Lapsed | 1960-11-29 | 1965-08-31 | 1 | Details |
| US3192921A | Body function measuring apparatus | Expired / Lapsed | 1961-07-10 | 1965-07-06 | 2 | Details |
| US3192408A | Pulse-generator providing output-pulse width determined by … | Expired / Lapsed | 1962-11-27 | 1965-06-29 | 2 | Details |
| US3192509A | Zone indicating and identification storing apparatus for re… | Expired / Lapsed | 1961-05-16 | 1965-06-29 | 1 | Details |
| US3187254A | Control apparatus with magnetoresistive pickoff means | Expired / Lapsed | 1961-04-06 | 1965-06-01 | 2 | Details |
| US3178562A | Control apparatus | Expired / Lapsed | 1962-06-08 | 1965-04-13 | 1 | Details |
| US3176283A | Supervised annunciator | Expired / Lapsed | 1962-02-15 | 1965-03-30 | 1 | Details |
| US3163729A | Humidity control apparatus employing lever means to actuate… | Expired / Lapsed | 1962-04-30 | 1964-12-29 | 2 | Details |
| US3143650A | Radiation detection apparatus with means to obtain substant… | Expired / Lapsed | 1962-04-16 | 1964-08-04 | 2 | Details |
| US3142043A | Information handling apparatus for distributing data in a s… | Expired / Lapsed | 1960-07-28 | 1964-07-21 | 1 | Details |
| US3138792A | Supervisory system | Expired / Lapsed | 1960-05-26 | 1964-06-23 | 1 | Details |
| US3133241A | Semiconductor inverter circuit with means to preset the cor… | Expired / Lapsed | 1961-08-28 | 1964-05-12 | 2 | Details |
| US3127754A | Refrigeration control apparatus with time delay means | Expired / Lapsed | 1962-10-04 | 1964-04-07 | 1 | Details |
| US3113211A | Enabling device for collision warning apparatus | Expired / Lapsed | 1959-06-01 | 1963-12-03 | 2 | Details |
| US3108183A | Air data computing apparatus | Expired / Lapsed | 1957-10-31 | 1963-10-22 | 2 | Details |
| US3103652A | Supervisory system | Expired / Lapsed | 1961-10-02 | 1963-09-10 | 2 | Details |
| US3091393A | Fluid amplifier mixing control system | Expired / Lapsed | 1961-07-05 | 1963-05-28 | 1 | Details |
| US3091705A | Pulse former utilizing minority carrier storage for stretch… | Expired / Lapsed | 1960-01-28 | 1963-05-28 | 2 | Details |
| US3090030A | Variable focus transducer | Expired / Lapsed | 1957-09-09 | 1963-05-14 | 2 | Details |
| US3089035A | Electrical pulse producing apparatus | Expired / Lapsed | 1959-01-28 | 1963-05-07 | 2 | Details |
| US3081765A | Medical body function recorder | Expired / Lapsed | 1960-06-15 | 1963-03-19 | 2 | Details |
| US3080886A | Fluid amplifier | Expired / Lapsed | 1961-09-18 | 1963-03-12 | 2 | Details |
| US3067336A | Bistable electronic switching circuitry for manipulating di… | Expired / Lapsed | 1957-05-03 | 1962-12-04 | 0 | Details |
| US3063662A | Automatic flight control apparatus for aircraft | Expired / Lapsed | 1959-12-31 | 1962-11-13 | 0 | Details |
| US3064191A | Electrical apparatus | Expired / Lapsed | 1959-01-16 | 1962-11-13 | 0 | Details |
| US3063036A | Information handling apparatus | Expired / Lapsed | 1958-09-08 | 1962-11-06 | 0 | Details |
| US3058663A | Selective control and display apparatus | Expired / Lapsed | 1957-10-03 | 1962-10-16 | 0 | Details |
| US3057584A | Automatic control apparatus | Expired / Lapsed | 1960-03-01 | 1962-10-09 | 0 | Details |
| US3053146A | Photographic slide projector | Expired / Lapsed | 1960-01-04 | 1962-09-11 | 0 | Details |
| US3051165A | Apparatus for automatically measuring blood pressure and pu… | Expired / Lapsed | 1959-10-14 | 1962-08-28 | 0 | Details |
| US3051003A | Measuring apparatus | Expired / Lapsed | 1958-11-21 | 1962-08-28 | 0 | Details |
| US3051416A | Maneuver limiting autopilot monitor | Expired / Lapsed | 1958-11-06 | 1962-08-28 | 0 | Details |
| US3051038A | Temperature measuring apparatus | Expired / Lapsed | 1958-10-21 | 1962-08-28 | 0 | Details |
| US3051877A | Semiconductor devices | Expired / Lapsed | 1955-12-29 | 1962-08-28 | 0 | Details |
| US3048329A | Aircraft instruments | Expired / Lapsed | 1958-03-17 | 1962-08-07 | 0 | Details |
| US3047703A | Sealing apparatus | Expired / Lapsed | 1959-03-26 | 1962-07-31 | 0 | Details |
| US3046786A | Condition responsive device | Expired / Lapsed | 1958-08-12 | 1962-07-31 | 0 | Details |
| US3045993A | Dryer control system | Expired / Lapsed | 1959-12-30 | 1962-07-24 | 0 | Details |
| US3040737A | Blood pressure measuring transducer | Expired / Lapsed | 1959-12-10 | 1962-06-26 | 0 | Details |
| US3039490A | Cylindrical fluid amplifier | Expired / Lapsed | 1961-05-11 | 1962-06-19 | 0 | Details |
| US3037697A | Information handling apparatus | Expired / Lapsed | 1959-06-17 | 1962-06-05 | 0 | Details |
| US3034002A | Conductive fluid power transformer | Expired / Lapsed | 1958-06-17 | 1962-05-08 | 0 | Details |
| US3033453A | Computers | Expired / Lapsed | 1957-12-02 | 1962-05-08 | 0 | Details |
| US3030814A | Control apparatus | Expired / Lapsed | 1959-11-12 | 1962-04-24 | 0 | Details |
| US3030054A | Automatic control apparatus for aircraft | Expired / Lapsed | 1958-08-18 | 1962-04-17 | 0 | Details |
| US3029414A | Information handling apparatus | Expired / Lapsed | 1958-08-11 | 1962-04-10 | 0 | Details |
| US3025503A | Information storage record and apparatus | Expired / Lapsed | 1956-08-01 | 1962-03-13 | 0 | Details |
| US3021793A | Fluid pump | Expired / Lapsed | 1959-12-09 | 1962-02-20 | 0 | Details |
| US3021433A | Asymmetrically conductive device employing semiconductors | Expired / Lapsed | 1957-12-31 | 1962-02-13 | 0 | Details |
| US3019647A | Electrical fluid-flow measuring apparatus | Expired / Lapsed | 1957-08-30 | 1962-02-06 | 0 | Details |
| US3017520A | Integral transistor-thermistor and circuit using same for c… | Expired / Lapsed | 1960-07-01 | 1962-01-16 | 0 | Details |
| US3017592A | Condition responsive apparatus | Expired / Lapsed | 1959-06-25 | 1962-01-16 | 2 | Details |
| US3008127A | Information handling apparatus | Expired / Lapsed | 1959-06-03 | 1961-11-07 | 0 | Details |
| US3005313A | Self-reversing apparatus | Expired / Lapsed | 1959-11-13 | 1961-10-24 | 0 | Details |
| US2994060A | System for propagating and receiving stepped frequency | Expired / Lapsed | 1952-09-15 | 1961-07-25 | 0 | Details |
| US2991011A | Hyperbolic navigation system and computer therefor | Expired / Lapsed | 1948-12-02 | 1961-07-04 | 0 | Details |
| US2989076A | Roller actuated valve | Expired / Lapsed | 1957-08-30 | 1961-06-20 | 0 | Details |
| US2986652A | Electrical signal gating apparatus | Expired / Lapsed | 1956-10-09 | 1961-05-30 | 0 | Details |
| US2984148A | Measuring apparatus | Expired / Lapsed | 1958-11-13 | 1961-05-16 | 0 | Details |
| US2979626A | Pulse generator having conditionresponsive timing means | Expired / Lapsed | 1958-06-09 | 1961-04-11 | 0 | Details |
| US2977991A | Controller | Expired / Lapsed | 1958-01-27 | 1961-04-04 | 0 | Details |
| US2978228A | Control apparatus | Expired / Lapsed | 1957-08-15 | 1961-04-04 | 0 | Details |
| US2978679A | Electrical information processing apparatus | Expired / Lapsed | 1957-01-07 | 1961-04-04 | 0 | Details |
| US2977047A | Error detecting and correcting apparatus | Expired / Lapsed | 1957-12-13 | 1961-03-28 | 0 | Details |
| US2974870A | Atmospheric condensation prevention control apparatus | Expired / Lapsed | 1957-08-15 | 1961-03-14 | 0 | Details |
| US2975411A | Analog to digital converter apparatus | Expired / Lapsed | 1957-05-21 | 1961-03-14 | 0 | Details |
| US2974237A | Control apparatus | Expired / Lapsed | 1956-01-26 | 1961-03-07 | 0 | Details |
| US2969678A | Meter | Expired / Lapsed | 1956-12-13 | 1961-01-31 | 0 | Details |
| US2967279A | Phototransistor modulating apparatus | Expired / Lapsed | 1956-05-21 | 1961-01-03 | 0 | Details |
| US2962645A | Automatic duplicating control apparatus | Expired / Lapsed | 1957-07-03 | 1960-11-29 | 0 | Details |
| US2959726A | Semiconductor apparatus | Expired / Lapsed | 1958-10-08 | 1960-11-08 | 0 | Details |
| US2957163A | Electrical apparatus | Expired / Lapsed | 1957-01-02 | 1960-10-18 | 0 | Details |
| US2955942A | Thaw indicator | Expired / Lapsed | 1957-07-18 | 1960-10-11 | 2 | Details |
| US2954738A | Diaphragm pump | Expired / Lapsed | 1957-11-08 | 1960-10-04 | 0 | Details |
| US2953733A | Servosystem for automatic pilots | Expired / Lapsed | 1955-10-17 | 1960-09-20 | 0 | Details |
| US2952772A | Electrical pulse shaping and amplifying circuit | Expired / Lapsed | 1956-08-20 | 1960-09-13 | 0 | Details |
| US2950728A | Flapper valve | Expired / Lapsed | 1954-12-03 | 1960-08-30 | 0 | Details |
| US2950469A | Analogue to digital conversion apparatus | Expired / Lapsed | 1954-04-14 | 1960-08-23 | 0 | Details |
| US2949514A | Condition responsive device | Expired / Lapsed | 1959-05-25 | 1960-08-16 | 0 | Details |
| US2948118A | Electromagnetic pump actuated device | Expired / Lapsed | 1955-02-28 | 1960-08-09 | 0 | Details |
| US2947915A | Electrical control apparatus | Expired / Lapsed | 1954-12-03 | 1960-08-02 | 0 | Details |
| US2947875A | Electrical control apparatus | Expired / Lapsed | 1954-07-23 | 1960-08-02 | 0 | Details |
| US2946989A | Temperature indicator and fire alarm system | Expired / Lapsed | 1954-10-18 | 1960-07-26 | 0 | Details |
| US2945133A | Transistor circuit | Expired / Lapsed | 1955-11-14 | 1960-07-12 | 0 | Details |
| US2941399A | Aircraft instruments | Expired / Lapsed | 1957-03-18 | 1960-06-21 | 0 | Details |
| US2938536A | Controller | Expired / Lapsed | 1957-10-29 | 1960-05-31 | 0 | Details |
| US2937369A | Electrical signal measuring apparatus | Expired / Lapsed | 1955-12-29 | 1960-05-17 | 0 | Details |
| US2935698A | Oscillator | Expired / Lapsed | 1958-03-19 | 1960-05-03 | 0 | Details |
| US2935077A | Bumpless manual automatic switch | Expired / Lapsed | 1956-03-01 | 1960-05-03 | 0 | Details |
| US2929972A | Semi-conductor devices | Expired / Lapsed | 1954-01-21 | 1960-03-22 | 0 | Details |
| US2921584A | Vessel occluder | Expired / Lapsed | 1954-12-17 | 1960-01-19 | 0 | Details |
| US2920214A | Condition responsive relay means | Expired / Lapsed | 1954-03-11 | 1960-01-05 | 0 | Details |
| US2917727A | Electrical apparatus | Expired / Lapsed | 1957-07-29 | 1959-12-15 | 0 | Details |
| US2909919A | Constituent potential measuring apparatus | Expired / Lapsed | 1955-07-21 | 1959-10-27 | 0 | Details |
| US2907932A | Phase discriminating apparatus | Expired / Lapsed | 1954-08-16 | 1959-10-06 | 0 | Details |
| US2902772A | Gyroscopic compass | Expired / Lapsed | 1951-10-01 | 1959-09-08 | 0 | Details |
| US2897295A | Cascaded tetrode transistor amplifier | Expired / Lapsed | 1956-06-28 | 1959-07-28 | 0 | Details |
| US2896151A | Semiconductor apparatus | Expired / Lapsed | 1958-03-21 | 1959-07-21 | 0 | Details |
| US2889496A | Electrical control apparatus | Expired / Lapsed | 1954-07-09 | 1959-06-02 | 0 | Details |
| US2888622A | Transistor motor control | Expired / Lapsed | 1955-08-15 | 1959-05-26 | 0 | Details |
| US2886754A | Push-pull motor drive circuit | Expired / Lapsed | 1955-03-24 | 1959-05-12 | 0 | Details |
| US2884939A | Automatic bumpless switching controller | Expired / Lapsed | 1955-12-13 | 1959-05-05 | 0 | Details |
| US2881408A | Inductive coupling for sonar apparatus | Expired / Lapsed | 1955-02-04 | 1959-04-07 | 0 | Details |
| US2875392A | Condition responsive apparatus for controlling an electric … | Expired / Lapsed | 1955-05-25 | 1959-02-24 | 0 | Details |
| US2874236A | Semiconductor stabilizing apparatus | Expired / Lapsed | 1956-12-24 | 1959-02-17 | 0 | Details |
| US2872595A | Transistor control apparatus | Expired / Lapsed | 1954-12-29 | 1959-02-03 | 0 | Details |
| US2870434A | Detection and signaling apparatus | Expired / Lapsed | 1955-01-18 | 1959-01-20 | 0 | Details |
| US2864985A | Electrical control apparatus | Expired / Lapsed | 1957-08-30 | 1958-12-16 | 0 | Details |
| US2864962A | Semiconductor apparatus | Expired / Lapsed | 1957-04-26 | 1958-12-16 | 0 | Details |
| US2864978A | Control apparatus | Expired / Lapsed | 1956-02-14 | 1958-12-16 | 0 | Details |
| US2863470A | Valve having manual and automatic means for operating it | Expired / Lapsed | 1955-05-27 | 1958-12-09 | 0 | Details |
| US2863622A | Automatic steering mechanism | Expired / Lapsed | 1951-01-08 | 1958-12-09 | 0 | Details |
| US2862171A | Control apparatus | Expired / Lapsed | 1957-01-02 | 1958-11-25 | 0 | Details |
| US2862162A | Force rebalancing servosystem | Expired / Lapsed | 1955-05-27 | 1958-11-25 | 0 | Details |
| US2851047A | Controller | Expired / Lapsed | 1955-02-14 | 1958-09-09 | 0 | Details |
| US2842311A | Control apparatus | Expired / Lapsed | 1955-03-24 | 1958-07-08 | 0 | Details |
| US2837104A | Rotary to linear motion transducer | Expired / Lapsed | 1953-05-29 | 1958-06-03 | 0 | Details |
| US2835449A | Air blender for air conditioning having temperature and pre… | Expired / Lapsed | 1953-06-26 | 1958-05-20 | 0 | Details |
| US2833938A | Condition responsive apparatus | Expired / Lapsed | 1956-11-29 | 1958-05-06 | 0 | Details |
| US2828450A | Transistor controller | Expired / Lapsed | 1955-05-09 | 1958-03-25 | 0 | Details |
| US2828459A | Magnetic tape playback speed control system | Expired / Lapsed | 1953-04-21 | 1958-03-25 | 0 | Details |
| US2826072A | Control apparatus | Expired / Lapsed | 1953-06-08 | 1958-03-11 | 0 | Details |
| US2825789A | Control apparatus | Expired / Lapsed | 1956-12-28 | 1958-03-04 | 0 | Details |
| US2822434A | Amplifying apparatus | Expired / Lapsed | 1954-02-15 | 1958-02-04 | 0 | Details |
| US2815915A | Air mixing apparatus having temperature and pressure control | Expired / Lapsed | 1953-08-10 | 1957-12-10 | 0 | Details |
| US2811856A | Temperature measuring apparatus | Expired / Lapsed | 1946-03-29 | 1957-11-05 | 0 | Details |
| US2800914A | Control apparatus | Expired / Lapsed | 1951-12-07 | 1957-07-30 | 0 | Details |
| US2798682A | Aircraft control apparatus responsive to angle of attack | Expired / Lapsed | 1948-12-30 | 1957-07-09 | 0 | Details |
| US2798157A | Control apparatus | Expired / Lapsed | 1952-03-26 | 1957-07-02 | 0 | Details |
| US2789543A | Stabilized pneumatic regulator apparatus | Expired / Lapsed | 1953-07-02 | 1957-04-23 | 0 | Details |
| US2790146A | Voltage ratio measuring apparatus | Expired / Lapsed | 1952-04-02 | 1957-04-23 | 0 | Details |
| US2788441A | Measuring and controlling apparatus | Expired / Lapsed | 1950-12-16 | 1957-04-09 | 0 | Details |
| US2787428A | Air traffic control apparatus | Expired / Lapsed | 1948-06-17 | 1957-04-02 | 0 | Details |
| US2779197A | Pressure compensated seal | Expired / Lapsed | 1954-01-25 | 1957-01-29 | 0 | Details |
| US2779655A | Graphical to digital indication converter | Expired / Lapsed | 1952-12-01 | 1957-01-29 | 0 | Details |
| US2778942A | Electrical control apparatus | Expired / Lapsed | 1954-07-09 | 1957-01-22 | 0 | Details |
| US2778571A | Temperature control with night set-back | Expired / Lapsed | 1953-10-05 | 1957-01-22 | 0 | Details |
| US2778574A | Oscillating control apparatus | Expired / Lapsed | 1952-06-11 | 1957-01-22 | 0 | Details |
| US2776382A | Voltage and current regulation | Expired / Lapsed | 1955-07-25 | 1957-01-01 | 0 | Details |
| US2776396A | Sector scan control servo system | Expired / Lapsed | 1953-10-19 | 1957-01-01 | 0 | Details |
| US2775730A | Battery capacitor power cartridge | Expired / Lapsed | 1952-10-02 | 1956-12-25 | 0 | Details |
| US2774021A | Electrical motor control apparatus | Expired / Lapsed | 1954-08-16 | 1956-12-11 | 0 | Details |
| US2770429A | Automatic control systems | Expired / Lapsed | 1951-09-17 | 1956-11-13 | 0 | Details |
| US2769453A | Self adjusting pneumatic control apparatus | Expired / Lapsed | 1954-10-08 | 1956-11-06 | 0 | Details |
| US2768524A | Ultrasonic absorption measuring apparatus | Expired / Lapsed | 1953-10-06 | 1956-10-30 | 0 | Details |
| US2767584A | Fluid quantity measuring apparatus | Expired / Lapsed | 1953-09-28 | 1956-10-23 | 0 | Details |
| US2755662A | Ultrasonic absorption measuring apparatus | Expired / Lapsed | 1953-05-01 | 1956-07-24 | 2 | Details |
| US2755020A | Measuring apparatus | Expired / Lapsed | 1951-10-16 | 1956-07-17 | 0 | Details |
| US2751972A | Burner safety control apparatus | Expired / Lapsed | 1954-01-28 | 1956-06-26 | 0 | Details |
| US2751542A | Aircraft acceleration limiters | Expired / Lapsed | 1951-10-24 | 1956-06-19 | 0 | Details |
| US2748845A | Burner control apparatus | Expired / Lapsed | 1953-04-23 | 1956-06-05 | 0 | Details |
| US2745285A | Temperature measuring apparatus | Expired / Lapsed | 1952-10-21 | 1956-05-15 | 0 | Details |
| US2742780A | Moisture indicating apparatus | Expired / Lapsed | 1950-10-27 | 1956-04-24 | 0 | Details |
| US2727999A | Phase sensitive demodulators | Expired / Lapsed | 1953-05-06 | 1955-12-20 | 0 | Details |
| US2724040A | Control apparatus | Expired / Lapsed | 1950-08-17 | 1955-11-15 | 0 | Details |
| US2719672A | Temperature control apparatus having night setback | Expired / Lapsed | 1951-12-01 | 1955-10-04 | 0 | Details |
| US2718878A | Motor having a diaphragm actuated by fluid pressure | Expired / Lapsed | 1954-02-02 | 1955-09-27 | 0 | Details |
| US2718146A | Fuel gage apparatus | Expired / Lapsed | 1951-10-01 | 1955-09-20 | 0 | Details |
| US2715703A | Remote digital controllers | Expired / Lapsed | 1950-06-29 | 1955-08-16 | 0 | Details |
| US2712321A | Control apparatus | Expired / Lapsed | 1951-04-17 | 1955-07-05 | 0 | Details |
| US2707880A | Relative humidity measuring apparatus | Expired / Lapsed | 1950-02-18 | 1955-05-10 | 0 | Details |
| US2701111A | Cruise control apparatus | Expired / Lapsed | 1951-09-22 | 1955-02-01 | 0 | Details |
| US2696119A | Temperature indicating apparatus | Expired / Lapsed | 1951-12-12 | 1954-12-07 | 0 | Details |
| US2692359A | Measuring and controlling apparatus | Expired / Lapsed | 1952-04-05 | 1954-10-19 | 0 | Details |
| US2692358A | Electric motor positioning system | Expired / Lapsed | 1952-03-29 | 1954-10-19 | 0 | Details |
| US2691123A | Sensitivity control for follow-up type of computer apparatus | Expired / Lapsed | 1950-01-21 | 1954-10-05 | 0 | Details |
| US2684418A | Actuating mechanism | Expired / Lapsed | 1951-01-05 | 1954-07-20 | 0 | Details |
| US2672151A | Measuring instrument | Expired / Lapsed | 1951-12-07 | 1954-03-16 | 0 | Details |
| US2668932A | Molded resistance device | Expired / Lapsed | 1950-06-29 | 1954-02-09 | 0 | Details |
| US2666889A | Control apparatus | Expired / Lapsed | 1951-03-15 | 1954-01-19 | 0 | Details |
| US2666585A | Distance adjusted pneumatic control system | Expired / Lapsed | 1948-09-11 | 1954-01-19 | 0 | Details |
| US2663001A | Variable limit switch assembly | Expired / Lapsed | 1952-10-13 | 1953-12-15 | 0 | Details |
| US2662220A | Clamping device for electronic discharge devices | Expired / Lapsed | 1950-05-06 | 1953-12-08 | 0 | Details |
| US2660056A | Angle of attack sensing device | Expired / Lapsed | 1949-02-03 | 1953-11-24 | 0 | Details |
| US2659234A | Temperature measuring apparatus | Expired / Lapsed | 1949-11-14 | 1953-11-17 | 0 | Details |
| US2659041A | Automatic steering mechanisms | Expired / Lapsed | 1952-08-25 | 1953-11-10 | 0 | Details |
| US2656977A | Fuel duration computer | Expired / Lapsed | 1950-04-01 | 1953-10-27 | 0 | Details |
| US2656444A | Pressure sensitive resistor | Expired / Lapsed | 1952-10-16 | 1953-10-20 | 0 | Details |
| US2648037A | Measuring apparatus | Expired / Lapsed | 1950-02-18 | 1953-08-04 | 0 | Details |
| US2647233A | Automatic steering apparatus | Expired / Lapsed | 1949-04-16 | 1953-07-28 | 0 | Details |
| US2646924A | Computer for estimated time of arrival | Expired / Lapsed | 1948-11-29 | 1953-07-28 | 0 | Details |
| US2638117A | Control system having a manual transfer valve | Expired / Lapsed | 1947-09-11 | 1953-05-12 | 0 | Details |
| US2637301A | Air actuated power cylinder control with rate response | Expired / Lapsed | 1947-08-26 | 1953-05-05 | 0 | Details |
| US2633858A | Proportional reset response fluid relay | Expired / Lapsed | 1947-11-14 | 1953-04-07 | 0 | Details |
| US2632086A | Temperature control apparatus | Expired / Lapsed | 1949-07-15 | 1953-03-17 | 0 | Details |
| US2626114A | Automatic steering mechanism | Expired / Lapsed | 1948-05-07 | 1953-01-20 | 0 | Details |
| US2626106A | Control apparatus | Expired / Lapsed | 1948-02-09 | 1953-01-20 | 0 | Details |
| US2620664A | Pyrometer with stable rectified voltage | Expired / Lapsed | 1947-09-08 | 1952-12-09 | 0 | Details |
| US2616490A | Fuel burner safety control apparatus | Expired / Lapsed | 1949-02-26 | 1952-11-04 | 0 | Details |
| US2614251A | Flight instrument | Expired / Lapsed | 1946-07-31 | 1952-10-14 | 0 | Details |
| US2609183A | Control apparatus | Expired / Lapsed | 1948-09-02 | 1952-09-02 | 0 | Details |
| US2604267A | Temperature control apparatus | Expired / Lapsed | 1948-11-01 | 1952-07-22 | 0 | Details |
| US2603681A | Printed circuit panel with connector | Expired / Lapsed | 1948-12-15 | 1952-07-15 | 0 | Details |
| US2602591A | Condition control apparatus | Expired / Lapsed | 1948-11-15 | 1952-07-08 | 0 | Details |
| US2601377A | Reversible thermostatic control device | Expired / Lapsed | 1948-10-13 | 1952-06-24 | 0 | Details |
| US2599586A | Marine depth finder | Expired / Lapsed | 1948-08-03 | 1952-06-10 | 0 | Details |
| US2596698A | Synchronizing arrangement | Expired / Lapsed | 1948-06-10 | 1952-05-13 | 0 | Details |
| US2595034A | Antihunting measuring and controlling apparatus | Expired / Lapsed | 1949-11-03 | 1952-04-29 | 0 | Details |
| US2592945A | Automatic starting system for internal-combustion engines | Expired / Lapsed | 1945-02-01 | 1952-04-15 | 0 | Details |
| US2590020A | Automatic pilot | Expired / Lapsed | 1945-06-27 | 1952-03-18 | 0 | Details |
| US2588799A | Manual transfer between automatic and manual regulating con… | Expired / Lapsed | 1947-10-14 | 1952-03-11 | 0 | Details |
| US2581522A | Stoker control apparatus | Expired / Lapsed | 1948-05-24 | 1952-01-08 | 0 | Details |
| US2577165A | Control device | Expired / Lapsed | 1948-12-16 | 1951-12-04 | 0 | Details |
| US2576892A | Testing apparatus | Expired / Lapsed | 1949-07-30 | 1951-11-27 | 0 | Details |
| US2574383A | Temperature control apparatus | Expired / Lapsed | 1947-11-17 | 1951-11-06 | 0 | Details |
| US2569791A | Voltage control system utilizing frequency modulation | Expired / Lapsed | 1947-01-10 | 1951-10-02 | 0 | Details |
| US2567575A | Resistance measuring apparatus | Expired / Lapsed | 1945-05-19 | 1951-09-11 | 0 | Details |
| US2566546A | Telautographic instrument | Expired / Lapsed | 1945-10-06 | 1951-09-04 | 0 | Details |
| US2564294A | Supervisory measuring instrument | Expired / Lapsed | 1949-07-30 | 1951-08-14 | 0 | Details |
| US2564597A | Flame detection apparatus | Expired / Lapsed | 1948-01-10 | 1951-08-14 | 0 | Details |
| US2563931A | Rate responsive thermocouple | Expired / Lapsed | 1946-04-02 | 1951-08-14 | 0 | Details |
| US2563280A | Liquid level measuring apparatus | Expired / Lapsed | 1945-01-29 | 1951-08-07 | 0 | Details |
| US2561077A | Radiation pyrometer | Expired / Lapsed | 1946-04-04 | 1951-07-17 | 0 | Details |
| US2559266A | Oscillator controlled relay system | Expired / Lapsed | 1949-07-09 | 1951-07-03 | 0 | Details |
| US2558096A | Flight control apparatus | Expired / Lapsed | 1946-08-19 | 1951-06-26 | 0 | Details |
| US2556973A | Cycler | Expired / Lapsed | 1948-02-02 | 1951-06-12 | 0 | Details |
| US2556788A | Standardizing apparatus for balancing networks | Expired / Lapsed | 1945-02-10 | 1951-06-12 | 0 | Details |
| US2554717A | Measuring and controlling apparatus | Expired / Lapsed | 1946-01-26 | 1951-05-29 | 0 | Details |
| US2553979A | Control for refrigerating apparatus | Expired / Lapsed | 1944-04-13 | 1951-05-22 | 0 | Details |
| US2537932A | Linear force balance angle of attack sensing device | Expired / Lapsed | 1948-10-11 | 1951-01-09 | 0 | Details |
| US2537315A | Outlet control | Expired / Lapsed | 1945-03-01 | 1951-01-09 | 0 | Details |
| US2535133A | Limit control apparatus | Expired / Lapsed | 1947-08-28 | 1950-12-26 | 0 | Details |
| US2531313A | Oscillator and oscillator-controlled relay system | Expired / Lapsed | 1944-06-22 | 1950-11-21 | 0 | Details |
| US2528626A | Control apparatus | Expired / Lapsed | 1947-04-30 | 1950-11-07 | 0 | Details |
| US2528589A | Control apparatus | Expired / Lapsed | 1946-11-13 | 1950-11-07 | 0 | Details |
| US2527665A | Measuring and controlling apparatus, including damping and … | Expired / Lapsed | 1946-06-21 | 1950-10-31 | 0 | Details |
| US2527207A | Multiple record, single marker recording system | Expired / Lapsed | 1944-04-12 | 1950-10-24 | 0 | Details |
| US2525094A | Recording instrument | Expired / Lapsed | 1946-06-21 | 1950-10-10 | 0 | Details |
| US2514445A | Control instrument | Expired / Lapsed | 1946-04-20 | 1950-07-11 | 0 | Details |
| US2514918A | Electronic control and indication apparatus | Expired / Lapsed | 1944-06-22 | 1950-07-11 | 0 | Details |
| US2509471A | Control apparatus | Expired / Lapsed | 1947-04-30 | 1950-05-30 | 0 | Details |
| US2508639A | Electrical motor control apparatus with means for reducing … | Expired / Lapsed | 1943-12-30 | 1950-05-23 | 0 | Details |
| US2498064A | Stabilizing apparatus for aircraft | Expired / Lapsed | 1944-02-28 | 1950-02-21 | 0 | Details |
| US2497051A | Chatter-free torque amplifier | Expired / Lapsed | 1944-08-12 | 1950-02-07 | 0 | Details |
| US2495861A | All year conditioning apparatus | Expired / Lapsed | 1945-04-18 | 1950-01-31 | 0 | Details |
| US2494135A | Control instrument | Expired / Lapsed | 1945-02-27 | 1950-01-10 | 0 | Details |
| US2487843A | Chart reroll mechanism | Expired / Lapsed | 1945-02-10 | 1949-11-15 | 0 | Details |
| US2487556A | Control apparatus | Expired / Lapsed | 1945-10-08 | 1949-11-08 | 0 | Details |
| US2484594A | Moisture responsive system | Expired / Lapsed | 1946-10-15 | 1949-10-11 | 0 | Details |
| US2484541A | Pressure measuring instrument | Expired / Lapsed | 1944-10-18 | 1949-10-11 | 0 | Details |
| US2481395A | Automatic pneumatic reset apparatus | Expired / Lapsed | 1944-12-18 | 1949-09-06 | 0 | Details |
| US2476849A | Discriminator circuit | Expired / Lapsed | 1947-12-13 | 1949-07-19 | 0 | Details |
| US2476496A | Condition regulating apparatus | Expired / Lapsed | 1944-07-14 | 1949-07-19 | 0 | Details |
| US2474441A | Temperature control apparatus for cabins of aircraft | Expired / Lapsed | 1946-06-06 | 1949-06-28 | 0 | Details |
| US2474177A | Cathode-ray indicator | Expired / Lapsed | 1947-04-17 | 1949-06-21 | 0 | Details |
| US2473494A | Electric motor control apparatus | Expired / Lapsed | 1945-12-12 | 1949-06-14 | 0 | Details |
| US2473401A | Sensitivity equalizing circuit for control apparatus | Expired / Lapsed | 1945-10-06 | 1949-06-14 | 0 | Details |
| US2471821A | Aircraft control apparatus | Expired / Lapsed | 1944-12-30 | 1949-05-31 | 0 | Details |
| US2470968A | Rheostat control device | Expired / Lapsed | 1945-06-27 | 1949-05-24 | 0 | Details |
| US2456765A | Hot-wire bridge overspeed controller | Expired / Lapsed | 1945-04-18 | 1948-12-21 | 0 | Details |
| US2454184A | Telemetric compass | Expired / Lapsed | 1947-08-20 | 1948-11-16 | 0 | Details |
| US2448167A | Flap control device responsive to air speed | Expired / Lapsed | 1942-12-12 | 1948-08-31 | 0 | Details |
| US2447344A | Photoelectric system for remote indication of angular posit… | Expired / Lapsed | 1943-05-31 | 1948-08-17 | 0 | Details |
| US2444733A | Impedance bridge | Expired / Lapsed | 1944-10-27 | 1948-07-06 | 0 | Details |
| US2443347A | Electronic control circuits | Expired / Lapsed | 1942-11-19 | 1948-06-15 | 0 | Details |
| US2440700A | Fluid burner safety control apparatus with ignition timing | Expired / Lapsed | 1945-08-03 | 1948-05-04 | 0 | Details |
| US2437332A | Low-temperature test chamber | Expired / Lapsed | 1944-01-01 | 1948-03-09 | 0 | Details |
| US2433574A | Hot gas defrosting | Expired / Lapsed | 1942-04-30 | 1947-12-30 | 0 | Details |
| US2423541A | Condition controlling apparatus | Expired / Lapsed | 1944-08-25 | 1947-07-08 | 0 | Details |
| US2423534A | Control apparatus | Expired / Lapsed | 1942-04-03 | 1947-07-08 | 0 | Details |
| US2414756A | Condition responsive device | Expired / Lapsed | 1943-05-07 | 1947-01-21 | 0 | Details |
| US2413897A | Transformer | Expired / Lapsed | 1942-05-15 | 1947-01-07 | 0 | Details |
| US2412471A | Air-speed responsive device | Expired / Lapsed | 1943-07-02 | 1946-12-10 | 0 | Details |
| US2412263A | Control apparatus | Expired / Lapsed | 1943-02-24 | 1946-12-10 | 0 | Details |
| US2408699A | Aircraft temperature control | Expired / Lapsed | 1942-11-30 | 1946-10-01 | 0 | Details |
| US2407361A | Temperature measuring system | Expired / Lapsed | 1943-07-28 | 1946-09-10 | 0 | Details |
| US2403917A | Control apparatus | Expired / Lapsed | 1942-04-20 | 1946-07-16 | 0 | Details |
| US2403843A | Resistance bulb thermostat | Expired / Lapsed | 1943-11-03 | 1946-07-09 | 0 | Details |
| US2396338A | Radiation heating and cooling system | Expired / Lapsed | 1943-02-24 | 1946-03-12 | 0 | Details |
| US2394885A | Liquid level responsive means | Expired / Lapsed | 1942-06-17 | 1946-02-12 | 0 | Details |
| US2389073A | Overload protection for refrigeration systems | Expired / Lapsed | 1943-04-23 | 1945-11-13 | 0 | Details |
| US2387795A | Aircraft control apparatus | Expired / Lapsed | 1943-03-26 | 1945-10-30 | 0 | Details |
| US2387604A | Automatic control system | Expired / Lapsed | 1941-05-28 | 1945-10-23 | 0 | Details |
| US2384380A | Control mechanism | Expired / Lapsed | 1943-03-26 | 1945-09-04 | 0 | Details |
| US2384373A | Time mechanism | Expired / Lapsed | 1942-12-31 | 1945-09-04 | 0 | Details |
| US2379871A | Burner control device | Expired / Lapsed | 1942-08-19 | 1945-07-10 | 0 | Details |
| US2373255A | Supervisory apparatus | Expired / Lapsed | 1943-06-24 | 1945-04-10 | 0 | Details |
| US2372839A | Air conditioning system | Expired / Lapsed | 1941-12-06 | 1945-04-03 | 0 | Details |
| US2367306A | Control for refrigerating apparatus | Expired / Lapsed | 1941-08-01 | 1945-01-16 | 0 | Details |
| US2367305A | Refrigerating system | Expired / Lapsed | 1940-11-30 | 1945-01-16 | 0 | Details |
| US2366566A | Temperature compensator for pressure responsive devices | Expired / Lapsed | 1942-05-18 | 1945-01-02 | 0 | Details |
| US2366501A | Control system | Expired / Lapsed | 1941-03-07 | 1945-01-02 | 0 | Details |
| US2366500A | Temperature control | Expired / Lapsed | 1940-05-10 | 1945-01-02 | 0 | Details |
| US2363595A | Condition responsive device | Expired / Lapsed | 1941-02-03 | 1944-11-28 | 0 | Details |
| US2363075A | Temperature responsive device | Expired / Lapsed | 1942-05-09 | 1944-11-21 | 0 | Details |
| US2355872A | Control device | Expired / Lapsed | 1942-06-17 | 1944-08-15 | 0 | Details |
| US2355567A | Control apparatus | Expired / Lapsed | 1942-07-18 | 1944-08-08 | 0 | Details |
| US2343467A | Air conditioning control system | Expired / Lapsed | 1941-06-28 | 1944-03-07 | 0 | Details |
| US2340004A | Control system | Expired / Lapsed | 1941-11-15 | 1944-01-25 | 0 | Details |
| US2335471A | Fluid fuel burner control system | Expired / Lapsed | 1940-06-05 | 1943-11-30 | 0 | Details |
| US2334445A | Air-conditioning system | Expired / Lapsed | 1942-06-04 | 1943-11-16 | 0 | Details |
| US2333913A | Valve mechanism | Expired / Lapsed | 1942-07-11 | 1943-11-09 | 0 | Details |
| US2330725A | Air conditioning system | Expired / Lapsed | 1941-06-16 | 1943-09-28 | 0 | Details |
| US2329636A | Control system | Expired / Lapsed | 1941-01-18 | 1943-09-14 | 0 | Details |
| US2327544A | Air conditioning system | Expired / Lapsed | 1938-12-03 | 1943-08-24 | 0 | Details |
| US2318706A | Air conditioning system | Expired / Lapsed | 1941-01-27 | 1943-05-11 | 0 | Details |
| US2313390A | Reverse cycle heating system | Expired / Lapsed | 1939-08-14 | 1943-03-09 | 0 | Details |
| US2309411A | Air conditioning control system | Expired / Lapsed | 1935-08-23 | 1943-01-26 | 0 | Details |
| US2303654A | Control apparatus | Expired / Lapsed | 1940-07-12 | 1942-12-01 | 0 | Details |
| US2297821A | Combustion control and safety alarm system | Expired / Lapsed | 1939-05-26 | 1942-10-06 | 0 | Details |
| US2298150A | Expansion valve | Expired / Lapsed | 1938-02-26 | 1942-10-06 | 0 | Details |
| US2292975A | Control apparatus | Expired / Lapsed | 1941-05-12 | 1942-08-11 | 0 | Details |
| US2291898A | Expansion valve | Expired / Lapsed | 1939-05-05 | 1942-08-04 | 0 | Details |
| US2286282A | Control apparatus | Expired / Lapsed | 1939-07-03 | 1942-06-16 | 0 | Details |
| US2286296A | Temperature control system | Expired / Lapsed | 1938-12-24 | 1942-06-16 | 0 | Details |
| US2286604A | Air conditioning system | Expired / Lapsed | 1938-06-25 | 1942-06-16 | 0 | Details |
| US2285513A | Control apparatus | Expired / Lapsed | 1939-12-30 | 1942-06-09 | 0 | Details |
| US2284914A | Air conditioning system | Expired / Lapsed | 1937-07-16 | 1942-06-02 | 0 | Details |
| US2283085A | Air conditioning | Expired / Lapsed | 1939-04-17 | 1942-05-12 | 0 | Details |
| US2282878A | Air conditioning system | Expired / Lapsed | 1938-05-06 | 1942-05-12 | 0 | Details |
| US2282210A | Air conditioning system | Expired / Lapsed | 1937-01-22 | 1942-05-05 | 0 | Details |
| US2280062A | Motorized mechanism | Expired / Lapsed | 1939-12-11 | 1942-04-21 | 0 | Details |
| US2273260A | Heating and control system | Expired / Lapsed | 1938-06-29 | 1942-02-17 | 0 | Details |
| US2271120A | Compensated two-stage hot air control system | Expired / Lapsed | 1938-10-27 | 1942-01-27 | 0 | Details |
| US2268442A | Dew-point indicator and controller | Expired / Lapsed | 1938-03-10 | 1941-12-30 | 0 | Details |
| US2267164A | Snap acting condition responsive device | Expired / Lapsed | 1939-09-30 | 1941-12-23 | 0 | Details |
| US2266217A | Air conditioning system | Expired / Lapsed | 1940-06-12 | 1941-12-16 | 0 | Details |
| US2266238A | Air conditioning system | Expired / Lapsed | 1938-02-07 | 1941-12-16 | 0 | Details |
| US2257975A | Air conditioning system | Expired / Lapsed | 1937-07-16 | 1941-10-07 | 0 | Details |
| US2257471A | Temperature control system | Expired / Lapsed | 1936-11-19 | 1941-09-30 | 0 | Details |
| US2251881A | Zone air conditioning control system | Expired / Lapsed | 1938-06-23 | 1941-08-05 | 0 | Details |
| US2249484A | Air conditioning system | Expired / Lapsed | 1934-12-17 | 1941-07-15 | 0 | Details |
| US2244892A | Refrigeration control system | Expired / Lapsed | 1939-01-20 | 1941-06-10 | 0 | Details |
| US2244634A | Air conditioning system | Expired / Lapsed | 1939-03-17 | 1941-06-03 | 0 | Details |
| US2244362A | Motor control system | Expired / Lapsed | 1937-10-21 | 1941-06-03 | 0 | Details |
| US2240607A | Fluid control system | Expired / Lapsed | 1938-01-06 | 1941-05-06 | 0 | Details |
| US2238688A | Air conditioning system | Expired / Lapsed | 1938-06-16 | 1941-04-15 | 0 | Details |
| US2234633A | Air conditioning system | Expired / Lapsed | 1940-04-19 | 1941-03-11 | 0 | Details |
| US2228523A | Snap action switch | Expired / Lapsed | 1937-12-31 | 1941-01-14 | 0 | Details |
| US2226847A | Variable resistance device | Expired / Lapsed | 1937-09-29 | 1940-12-31 | 0 | Details |
| US2225700A | Thermocouple apparatus | Expired / Lapsed | 1937-12-20 | 1940-12-24 | 0 | Details |
| US2225955A | Air conditioning system | Expired / Lapsed | 1937-03-05 | 1940-12-24 | 0 | Details |
| US2223287A | Air conditioning system | Expired / Lapsed | 1938-06-18 | 1940-11-26 | 0 | Details |
| US2222568A | Starting and ignition system | Expired / Lapsed | 1938-07-25 | 1940-11-19 | 0 | Details |
| US2222141A | Valve mechanism | Expired / Lapsed | 1938-04-07 | 1940-11-19 | 0 | Details |
| US2222159A | Cooling system | Expired / Lapsed | 1935-06-08 | 1940-11-19 | 0 | Details |
| US2217680A | Air conditioning system | Expired / Lapsed | 1937-02-23 | 1940-10-15 | 0 | Details |
| US2216301A | Temperature control system | Expired / Lapsed | 1938-11-21 | 1940-10-01 | 0 | Details |
| US2216556A | Burner control system | Expired / Lapsed | 1938-08-04 | 1940-10-01 | 0 | Details |
| US2214558A | Condition controller | Expired / Lapsed | 1938-05-16 | 1940-09-10 | 0 | Details |
| US2214384A | Method for winding coils | Expired / Lapsed | 1937-08-25 | 1940-09-10 | 0 | Details |
| US2211701A | Two-stage relay | Expired / Lapsed | 1938-11-25 | 1940-08-13 | 0 | Details |
| US2210868A | Static pressure regulator | Expired / Lapsed | 1937-10-02 | 1940-08-06 | 0 | Details |
| US2209787A | Air conditioning system | Expired / Lapsed | 1938-10-03 | 1940-07-30 | 0 | Details |
| US2209721A | Switching mechanism | Expired / Lapsed | 1937-05-07 | 1940-07-30 | 0 | Details |
| US2208562A | Automatic control system | Expired / Lapsed | 1936-11-23 | 1940-07-23 | 0 | Details |
| US2206009A | Air conditioning system | Expired / Lapsed | 1937-02-27 | 1940-06-25 | 0 | Details |
| US2203523A | Pressure controller | Expired / Lapsed | 1935-07-15 | 1940-06-04 | 0 | Details |
| US2192144A | Temperature control system | Expired / Lapsed | 1936-10-15 | 1940-02-27 | 0 | Details |
| US2188775A | Zone temperature control system | Expired / Lapsed | 1936-01-02 | 1940-01-30 | 0 | Details |
| US2183874A | Air conditioning system | Expired / Lapsed | 1934-06-28 | 1939-12-19 | 0 | Details |
| US2177602A | Air conditioning system | Expired / Lapsed | 1936-05-11 | 1939-10-24 | 0 | Details |
| US2177596A | Control system for air conditioners | Expired / Lapsed | 1935-09-05 | 1939-10-24 | 0 | Details |
| US2173810A | Automatic reset mechanism | Expired / Lapsed | 1936-11-23 | 1939-09-19 | 0 | Details |
| US2172440A | Automatic brake for motor shafts | Expired / Lapsed | 1936-11-18 | 1939-09-12 | 0 | Details |
| US2172487A | Load compensated control system | Expired / Lapsed | 1935-12-19 | 1939-09-12 | 0 | Details |
| US2165555A | Control device | Expired / Lapsed | 1936-08-06 | 1939-07-11 | 0 | Details |
| US2160600A | Heating system | Expired / Lapsed | 1935-05-23 | 1939-05-30 | 0 | Details |
| US2155358A | Fluid flow regulator | Expired / Lapsed | 1936-01-08 | 1939-04-18 | 0 | Details |
| US2154523A | Unit ventilator | Expired / Lapsed | 1935-10-14 | 1939-04-18 | 0 | Details |
| US2149542A | Temperature control | Expired / Lapsed | 1936-04-01 | 1939-03-07 | 0 | Details |
| US2143356A | Automatic air conditioning system | Expired / Lapsed | 1934-09-10 | 1939-01-10 | 0 | Details |
| US2140473A | Control system | Expired / Lapsed | 1935-07-22 | 1938-12-13 | 0 | Details |
| US2135991A | Time and remote control system | Expired / Lapsed | 1935-08-24 | 1938-11-08 | 0 | Details |
| US2117768A | Clock thermostat | Expired / Lapsed | 1935-04-01 | 1938-05-17 | 0 | Details |
| US2114961A | Electromagnetic valve | Expired / Lapsed | 1934-08-20 | 1938-04-19 | 0 | Details |
| US2096323A | Temperature measuring apparatus | Expired / Lapsed | 1935-10-31 | 1937-10-19 | 0 | Details |
| US2083780A | Control system | Expired / Lapsed | 1934-09-24 | 1937-06-15 | 0 | Details |
| US2081091A | Burner control system | Expired / Lapsed | 1934-09-08 | 1937-05-18 | 0 | Details |
| US2076768A | Modulating oil burner system with intermittent ignition | Expired / Lapsed | 1933-11-11 | 1937-04-13 | 0 | Details |
| US2023748A | Electrical resistance apparatus | Expired / Lapsed | 1934-05-16 | 1935-12-10 | 0 | Details |
| US2021413A | Gear train release | Expired / Lapsed | 1932-11-12 | 1935-11-19 | 0 | Details |
| US1997559A | Automatic control system | Expired / Lapsed | 1934-07-07 | 1935-04-09 | 0 | Details |
| US1989278A | System for air circulation control in hot air furnaces | Expired / Lapsed | 1930-07-03 | 1935-01-29 | 0 | Details |
| US1988877A | Effective temperature controller | Expired / Lapsed | 1932-11-02 | 1935-01-22 | 0 | Details |
| US1924925A | Furnace control means | Expired / Lapsed | 1932-02-08 | 1933-08-29 | 0 | Details |
| US1899254A | Electrical connection | Expired / Lapsed | 1929-03-09 | 1933-02-28 | 0 | Details |
| US1878010A | Apparatus for controlling burners | Expired / Lapsed | 1925-06-19 | 1932-09-20 | 0 | Details |
| US1816881A | Process of cleaning wire | Expired / Lapsed | 1930-03-10 | 1931-08-04 | 0 | Details |
| US1768941A | Unit heater control | Expired / Lapsed | 1927-06-10 | 1930-07-01 | 0 | Details |
| US1607392A | Automatically-controlled valve | Expired / Lapsed | 1924-10-23 | 1926-11-16 | 0 | Details |
| US1239594A | Heat-regulator. | Expired / Lapsed | 1916-12-20 | 1917-09-11 | 0 | Details |