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Honeywell Inc

Honeywell
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954

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Patent No. Title Status Filing Date Grant Date Claims Actions
EP0390052A2 Landmark recognition system and process Expired / Lapsed 1990-03-27 — 9 Details
EP0358592A2 Metallic bond for mounting of optical fibers to integrated … Expired / Lapsed 1989-09-08 — 32 Details
EP0330105A2 Integrated thin-film diaphragm Expired / Lapsed 1989-02-18 — 11 Details
EP0100097A2 Computer controlled imaging system Expired / Lapsed 1983-07-27 — 51 Details
EP0101204A2 Chassis insertion/extraction mechanism Expired / Lapsed 1983-07-20 — 11 Details
DE2725617A1 METHOD AND ARRANGEMENT FOR DISTANCE MEASUREMENT Expired / Lapsed 1977-06-07 — 0 Details
DE2447398A1 Automatic camera focusser - has modulating mask in beam pat… Expired / Lapsed 1974-10-04 — 0 Details
DE2047725A1 System for central control and monitoring Expired / Lapsed 1970-09-29 — 0 Details
GB886421A Improvements in or relating to data processing apparatus Expired / Lapsed 1958-01-24 — 0 Details
US5797562A Aircraft display combining error tape and reference bugs Expired / Lapsed 1995-07-26 1998-08-25 24 Details
US5396510A Laser sensor capable of measuring distance, velocity, and a… Expired / Lapsed 1993-09-30 1995-03-07 11 Details
US5394238A Look-ahead windshear detector by filtered Rayleigh and/or a… Expired / Lapsed 1992-11-09 1995-02-28 23 Details
US5359890A Integrated electronic primary flight display Expired / Lapsed 1993-05-04 1994-11-01 12 Details
US5337982A Apparatus and method for controlling the vertical profile o… Expired / Lapsed 1991-10-10 1994-08-16 11 Details
US5331562A Terrain referenced navigation-adaptive filter distribution Expired / Lapsed 1992-01-16 1994-07-19 15 Details
US3875401B1 Focus detecting apparatus Expired / Lapsed 1973-07-09 1994-02-01 0 Details
US5250947A Altitude tape for aircraft displays Expired / Lapsed 1992-03-16 1993-10-05 3 Details
US5041982A Edit area algorithm for navigation display of an electronic… Expired / Lapsed 1990-10-09 1991-08-20 20 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
DE3204159C2 DE3204159C2 - - Google Patents Expired / Lapsed 1982-02-06 1989-08-31 0 Details
US4857922A Windshear detection and warning system with evasion command Expired / Lapsed 1986-02-28 1989-08-15 17 Details
US4855822A Human engineered remote driving system Expired / Lapsed 1988-01-26 1989-08-08 15 Details
US4848643A Process of bonding plates Expired / Lapsed 1988-09-19 1989-07-18 9 Details
US4835536A Weather radar with turbulence detection Expired / Lapsed 1987-12-21 1989-05-30 8 Details
US4830328A Portable computer system and stand for use therewith Expired / Lapsed 1987-04-24 1989-05-16 9 Details
US4829250A Magnetic direction finding device with improved accuracy Expired / Lapsed 1988-02-10 1989-05-09 6 Details
US4771469A Means and method of representing an object shape by hierarc… Expired / Lapsed 1986-06-30 1988-09-13 7 Details
US4767934A Active ranging system Expired / Lapsed 1986-07-02 1988-08-30 17 Details
US4728951A Vertical windshear detection for aircraft Expired / Lapsed 1986-02-28 1988-03-01 12 Details
US4695959A Passive range measurement apparatus and method Expired / Lapsed 1986-08-29 1987-09-22 20 Details
USD286773S Remote communications module Expired / Lapsed 1983-12-14 1986-11-18 1 Details
US4600469A Method for polishing detector material Expired / Lapsed 1984-12-21 1986-07-15 18 Details
US4598414A Input compression apparatus for charge coupled devices Expired / Lapsed 1984-10-26 1986-07-01 19 Details
US4593967A 3-D active vision sensor Expired / Lapsed 1984-11-01 1986-06-10 26 Details
US4593285A Windshear detection and warning system with evasion command Expired / Lapsed 1983-05-06 1986-06-03 15 Details
US4581928A Slotted diaphragm semiconductor device Expired / Lapsed 1984-10-01 1986-04-15 54 Details
US4567466A Sensor communication system Expired / Lapsed 1982-12-08 1986-01-28 5 Details
US4533915A Radar terrain signal suppressor Expired / Lapsed 1982-02-16 1985-08-06 7 Details
US4522690A Electrochemical sensing of carbon monoxide Expired / Lapsed 1983-12-01 1985-06-11 20 Details
US4507551A Optical detection system having a detector lens comprising … Expired / Lapsed 1983-03-14 1985-03-26 11 Details
US4494183A Process variable transmitter having a non-interacting opera… Expired / Lapsed 1982-06-17 1985-01-15 14 Details
US4490805A High speed multiply accumulate processor Expired / Lapsed 1982-09-20 1984-12-25 9 Details
US4490797A Method and apparatus for controlling the display of a compu… Expired / Lapsed 1982-01-18 1984-12-25 14 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
US4481594A Method and apparatus for filling polygons displayed by a ra… Expired / Lapsed 1982-01-18 1984-11-06 12 Details
US4479070A Vibrating quartz diaphragm pressure sensor Expired / Lapsed 1983-06-10 1984-10-23 26 Details
US4468084A Integrated optical time integrating correlator Expired / Lapsed 1982-11-22 1984-08-28 12 Details
US4460964A Multiaxis hardover protection apparatus for automatic fligh… Expired / Lapsed 1981-08-31 1984-07-17 16 Details
US4450358A Optical lithographic system Expired / Lapsed 1982-09-22 1984-05-22 21 Details
US4445779A Dither system for a spring mass system Expired / Lapsed 1981-07-06 1984-05-01 29 Details
US4440368A Mounting system for panel mounted devices Expired / Lapsed 1981-05-07 1984-04-03 15 Details
US4415653A Method of making sensitive positive electron beam resists Expired / Lapsed 1982-12-07 1983-11-15 13 Details
US4410804A Two dimensional image panel with range measurement capabili… Expired / Lapsed 1981-07-13 1983-10-18 7 Details
US4377848A Altitude capture mode for aircraft automatic flight control… Expired / Lapsed 1980-10-16 1983-03-22 13 Details
US4373175A Apparatus to dissipate static electricity Expired / Lapsed 1981-03-17 1983-02-08 20 Details
US4342986A Central station alarm reporting system Expired / Lapsed 1980-05-07 1982-08-03 53 Details
US4333007A Method and apparatus for determining focus direction and am… Expired / Lapsed 1980-07-10 1982-06-01 13 Details
US4303984A Sensor output correction circuit Expired / Lapsed 1979-12-14 1981-12-01 14 Details
USD260617S Portable electronic tester and analyzer Expired / Lapsed 1979-11-21 1981-09-08 1 Details
US4285552A Torquer apparatus for magnetically suspended members Expired / Lapsed 1980-02-11 1981-08-25 7 Details
US4286286A Photo controlled stereoscopic television system Expired / Lapsed 1979-05-02 1981-08-25 5 Details
US4277134A Fiber optic loop signal coupler apparatus Expired / Lapsed 1978-01-19 1981-07-07 17 Details
US4268115A Quick-release fiber-optic connector Expired / Lapsed 1979-06-01 1981-05-19 13 Details
US4264953A Virtual cache Expired / Lapsed 1979-03-30 1981-04-28 8 Details
US4253731A Infrared fiber of AgCl clad AgBr and method of fabrication Expired / Lapsed 1979-04-09 1981-03-03 14 Details
US4249073A Method and apparatus for determining focus position Expired / Lapsed 1979-03-01 1981-02-03 29 Details
US4247823A Low noise, low phase shift analog signal multiplier Expired / Lapsed 1979-03-23 1981-01-27 9 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
US4222629A Fiber optic connector assembly Expired / Lapsed 1978-03-27 1980-09-16 8 Details
US4212209A Differential pressure to electric current transducer employ… Expired / Lapsed 1978-09-07 1980-07-15 8 Details
US4209840A Data processing protocol system Expired / Lapsed 1978-06-28 1980-06-24 16 Details
US4208024A Control apparatus Expired / Lapsed 1961-01-11 1980-06-17 32 Details
US4201446A Fiber optic temperature sensor using liquid component fiber Expired / Lapsed 1978-10-20 1980-05-06 8 Details
US4190318A Optical slip ring apparatus utilizing radial light signals Expired / Lapsed 1978-01-19 1980-02-26 22 Details
US4185191A Range determination system Expired / Lapsed 1978-06-05 1980-01-22 12 Details
US4184968A Auto focus system Expired / Lapsed 1978-02-13 1980-01-22 28 Details
US4151511A Digital correlator Expired / Lapsed 1976-11-19 1979-04-24 4 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
US4103273A Method for batch fabricating semiconductor devices Expired / Lapsed 1974-09-30 1978-07-25 38 Details
US4101331A Halide optical elements Expired / Lapsed 1977-03-15 1978-07-18 7 Details
US4094479A Side slip angle command SCAS for aircraft Expired / Lapsed 1977-03-25 1978-06-13 9 Details
US4090776A Fabrication of optical waveguides Expired / Lapsed 1976-10-13 1978-05-23 8 Details
US4080531A Single pass distance determining and automatic focusing app… Expired / Lapsed 1976-06-29 1978-03-21 25 Details
US4078171A Digital auto focus Expired / Lapsed 1976-06-14 1978-03-07 24 Details
US4072058A Differential pressure transmitter with pressure sensor prot… Expired / Lapsed 1976-05-03 1978-02-07 6 Details
US4059758A Autofocus system Expired / Lapsed 1976-10-07 1977-11-22 15 Details
US4059756A Focus control system with dual scan Expired / Lapsed 1976-10-01 1977-11-22 47 Details
US4044371A Plurality of precise temperature resistors formed in monoli… Expired / Lapsed 1976-09-29 1977-08-23 7 Details
US4044339A Block oriented random access memory Expired / Lapsed 1975-12-15 1977-08-23 7 Details
US4041486A Pulse stream identification circuit Expired / Lapsed 1975-11-10 1977-08-09 9 Details
US4031756A Ultrasonic air movement and temperature measuring apparatus Expired / Lapsed 1976-08-02 1977-06-28 12 Details
US4028815A Temperature compensated toroidal accelerometer Expired / Lapsed 1974-11-18 1977-06-14 14 Details
US4021119A Position gauge Expired / Lapsed 1975-06-24 1977-05-03 5 Details
US4019172A Central supervisory and control system generating 16-bit ou… Expired / Lapsed 1976-01-19 1977-04-19 23 Details
US4017841A Bus allocation control apparatus Expired / Lapsed 1975-07-21 1977-04-12 7 Details
US4016506A Dielectric waveguide oscillator Expired / Lapsed 1975-12-24 1977-04-05 25 Details
US4009464A Apparatus for indicating attitude failure Expired / Lapsed 1976-01-16 1977-02-22 6 Details
US4002899A Focus detecting apparatus Expired / Lapsed 1975-10-31 1977-01-11 59 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
US4000417A Scanning microscope system with automatic cell find and aut… Expired / Lapsed 1975-08-25 1976-12-28 41 Details
US3984819A Data processing interconnection techniques Expired / Lapsed 1976-03-08 1976-10-05 12 Details
US3983540A Rapid bus priority resolution Expired / Lapsed 1975-09-08 1976-09-28 12 Details
US3979922A Energy conservation air conditioning system Expired / Lapsed 1974-12-30 1976-09-14 21 Details
US3979090A Velocity damped erection system for stable gyroscopic attit… Expired / Lapsed 1975-03-17 1976-09-07 9 Details
US3969699A Image dissector with many apertures for Hadamard encoding Expired / Lapsed 1975-04-11 1976-07-13 5 Details
US3968362A Optical system for laser doppler homodyne detection Expired / Lapsed 1975-08-11 1976-07-06 41 Details
US3968459A Ultrasonic driver transducer Expired / Lapsed 1975-01-29 1976-07-06 16 Details
US3956927A Strain gauge transducer apparatus Expired / Lapsed 1975-09-29 1976-05-18 13 Details
US3954024A Automatic adaptive centering apparatus for electrically sup… Expired / Lapsed 1974-10-25 1976-05-04 6 Details
US3949607A Enthalpy control apparatus for air conditioning Expired / Lapsed 1974-10-03 1976-04-13 8 Details
US3938257A Two-cycle compensator for flux valve heading repeater system Expired / Lapsed 1974-12-02 1976-02-17 9 Details
US3936882A Adjustable mounting arrangement for recording head Expired / Lapsed 1974-08-27 1976-02-03 6 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
US3899662A Method and means for reducing data transmission rate in syn… Expired / Lapsed 1973-11-30 1975-08-12 17 Details
US3884788A Substrate preparation for liquid phase epitaxy of mercury c… Expired / Lapsed 1973-08-30 1975-05-20 4 Details
US3882887A Optical self-checking level detector Expired / Lapsed 1973-10-31 1975-05-13 11 Details
US3882497A Synchronizing techniques for an aircraft collision avoidanc… Expired / Lapsed 1973-07-02 1975-05-06 12 Details
US3875401A Focus detecting apparatus Expired / Lapsed 1973-07-09 1975-04-01 17 Details
US3870405A Helmet sight visors Expired / Lapsed 1973-06-12 1975-03-11 9 Details
US3860935A Auto focus camera Expired / Lapsed 1973-12-19 1975-01-14 17 Details
US3842681A Angular rate sensor Expired / Lapsed 1973-07-19 1974-10-22 9 Details
US3842676A Altitude computer apparatus Expired / Lapsed 1973-05-03 1974-10-22 8 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
US3836772A Detecting apparatus for determining when image is in focus Expired / Lapsed 1973-07-18 1974-09-17 8 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
US3780588A Differential pressure responsive apparatus Expired / Lapsed 1972-03-31 1973-12-25 12 Details
US3778703A Apparatus for detecting unlevelness of a pendulously suppor… Expired / Lapsed 1971-12-20 1973-12-11 7 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
US3736561A Patrol tour system Expired / Lapsed 1972-03-24 1973-05-29 22 Details
US3716096A Temperature control and supervision system for a building a… Expired / Lapsed 1971-09-07 1973-02-13 4 Details
US3715702A Relative humidity sensor Expired / Lapsed 1971-06-23 1973-02-06 9 Details
US3715562A Computer for use with ring laser rotational rate sensors Expired / Lapsed 1970-03-19 1973-02-06 24 Details
US3705980A Controlled magnitude repeater for synchro and resolver sign… Expired / Lapsed 1970-01-02 1972-12-12 0 Details
US3705295A Conversion system Expired / Lapsed 1971-02-08 1972-12-05 20 Details
US3703829A Liquid quantity gaging system Expired / Lapsed 1971-04-19 1972-11-28 19 Details
US3701903A Piezoelectric vehicle impact sensor Expired / Lapsed 1970-10-29 1972-10-31 7 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
US3696346A Beam addressed optical memory Expired / Lapsed 1971-08-30 1972-10-03 10 Details
US3692240A Pneumatic control system Expired / Lapsed 1970-07-24 1972-09-19 9 Details
US3689754A Function generator Expired / Lapsed 1970-12-07 1972-09-05 15 Details
US3688131A Time delay device Expired / Lapsed 1970-03-16 1972-08-29 4 Details
US3683668A Compass calibrator Expired / Lapsed 1971-01-26 1972-08-15 17 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
US3669561A Hydrodynamic pump Expired / Lapsed 1970-10-09 1972-06-13 0 Details
US3660675A Transmission line series termination network for interconne… Expired / Lapsed 1970-05-05 1972-05-02 20 Details
US3648141A Tape drive error-cancelling system Expired / Lapsed 1971-03-11 1972-03-07 5 Details
US3648252A Multiprogrammable, multiprocessor computer system Expired / Lapsed 1969-11-03 1972-03-07 29 Details
US3644806A High-speed printer-paper feed engine Expired / Lapsed 1970-03-24 1972-02-22 17 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
US3631405A Sharing of microprograms between processors Expired / Lapsed 1969-11-12 1971-12-28 29 Details
US3631269A Delay apparatus Expired / Lapsed 1968-12-30 1971-12-28 31 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
US3626473A Fluidic median selector Expired / Lapsed 1969-05-23 1971-12-07 6 Details
US3624615A Transaction-recording device Expired / Lapsed 1969-11-19 1971-11-30 17 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
US3618082A Information retrieval system with a remote station hold cir… Expired / Lapsed 1969-04-09 1971-11-02 9 Details
US3614721A Control apparatus Expired / Lapsed 1969-07-16 1971-10-19 13 Details
US3605083A Attitude and flight director display apparatus utilizing a … Expired / Lapsed 1969-10-08 1971-09-14 24 Details
US3605060A Apparatus for terminating electrical ribbon cable Expired / Lapsed 1968-08-05 1971-09-14 20 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
US3576986A Analog/digital differential apparatus for comparing resolve… Expired / Lapsed 1969-01-14 1971-05-04 14 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
US3571608A Protective circuit Expired / Lapsed 1969-04-04 1971-03-23 9 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
US3560924A Digital data error detection apparatus Expired / Lapsed 1969-10-01 1971-02-02 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
US3555402A Constant current temperature stabilized signal converter ci… Expired / Lapsed 1968-12-18 1971-01-12 0 Details
US3555251A Optimizing system for a plurality of temperature conditioni… Expired / Lapsed 1967-12-06 1971-01-12 7 Details
US3553723A Signal processor for generating and analyzing spectral info… Expired / Lapsed 1967-10-26 1971-01-05 0 Details
US3553595A Control apparatus Expired / Lapsed 1967-07-28 1971-01-05 0 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
US3549910A Electric current-voltage converting circuit Expired / Lapsed 1968-09-16 1970-12-22 0 Details
US3544882A Electric current range converting amplifier Expired / Lapsed 1968-08-27 1970-12-01 0 Details
US3540477A Pneumatic supply-exhaust circuit Expired / Lapsed 1969-03-18 1970-11-17 0 Details
US3540525A Pneumatic control apparatus Expired / Lapsed 1968-12-23 1970-11-17 0 Details
US3535561A Adjustable differential amplifier system including feedback… Expired / Lapsed 1968-10-29 1970-10-20 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
US3530389A Electronic process controller having a two part error ampli… Expired / Lapsed 1968-02-09 1970-09-22 0 Details
US3522588A Direct digital control interfacing circuitry Expired / Lapsed 1967-07-06 1970-08-04 0 Details
US3522444A Logic circuit with complementary output stage Expired / Lapsed 1967-03-17 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
US3517178A Arithmetic circuits with field effect transistor in input n… Expired / Lapsed 1968-06-28 1970-06-23 0 Details
US3514637A Control apparatus Expired / Lapsed 1967-12-27 1970-05-26 0 Details
US3510648A Apparatus employing ultraviolet radiation for measuring the… Expired / Lapsed 1967-04-25 1970-05-05 0 Details
US3509381A Multivibrator circuit including output buffer means and log… Expired / Lapsed 1967-01-11 1970-04-28 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
US3495245A Radio distance measuring system Expired / Lapsed 1967-08-11 1970-02-10 0 Details
US3495217A Digital data transmission apparatus Expired / Lapsed 1966-12-19 1970-02-10 0 Details
US3484596A Spectrophotometric readout device Expired / Lapsed 1966-02-14 1969-12-16 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
US3481299A Control apparatus Expired / Lapsed 1967-12-01 1969-12-02 0 Details
US3479458A Automatic channel equalization apparatus Expired / Lapsed 1967-03-06 1969-11-18 0 Details
US3477004A Control apparatus Expired / Lapsed 1968-01-11 1969-11-04 0 Details
US3473074A Ground electrode structure for electroprinting system Expired / Lapsed 1967-08-31 1969-10-14 0 Details
US3467472A Random bias for laser angular rate sensor Expired / Lapsed 1966-12-05 1969-09-16 2 Details
US3466605A Alarm printer Expired / Lapsed 1967-11-28 1969-09-09 0 Details
US3462604A Control apparatus sensitive to eye movement Expired / Lapsed 1967-08-23 1969-08-19 0 Details
US3449722A Electronic multiprocessing apparatus including common queue… Expired / Lapsed 1966-05-02 1969-06-10 0 Details
US3445771A Automatic data channel equalization apparatus utilizing a t… Expired / Lapsed 1966-02-28 1969-05-20 0 Details
US3445348A Cellular structure and method of manufacture Expired / Lapsed 1965-05-12 1969-05-20 0 Details
US3444529A Control adapter assembly for a chain printer Expired / Lapsed 1967-01-03 1969-05-13 0 Details
US3443573A Fluid apparatus Expired / Lapsed 1966-02-21 1969-05-13 0 Details
US3443123A Apparatus for normalizing a phase or angle radar informatio… Expired / Lapsed 1965-06-21 1969-05-06 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
US3436647A Phase shifting control by phase comparison of signals Expired / Lapsed 1966-05-25 1969-04-01 0 Details
US3435425A Storage device with readout system and having photoconducto… Expired / Lapsed 1966-07-05 1969-03-25 1 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
US3426316A Electric lead terminal Expired / Lapsed 1966-02-15 1969-02-04 0 Details
US3415071A Refrigeration condenser fan speed control system Expired / Lapsed 1966-04-04 1968-12-10 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
US3409369A Laser radar Expired / Lapsed 1964-04-30 1968-11-05 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
US3402264A Digital synchronizer Expired / Lapsed 1964-05-22 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
US3398354A Voltage control apparatus Expired / Lapsed 1964-12-23 1968-08-20 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
US3386053A Signal converter circuits having constant input and output … Expired / Lapsed 1965-04-26 1968-05-28 0 Details
US3378779A Demodulator circuit with control feedback means Expired / Lapsed 1965-04-26 1968-04-16 0 Details
US3377548A Process controller providing rapid or gradual variations in… Expired / Lapsed 1966-03-04 1968-04-09 2 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
US3373435A Recorder with flexible loop support for ink supply tubing Expired / Lapsed 1967-01-30 1968-03-12 0 Details
US3369221A Information handling apparatus Expired / Lapsed 1964-05-04 1968-02-13 2 Details
US3368209A Laser actuated curie point recording and readout system Expired / Lapsed 1964-10-22 1968-02-06 0 Details
US3365799A Angular position measuring device Expired / Lapsed 1965-01-13 1968-01-30 0 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
US3351315A Control apparatus Expired / Lapsed 1962-02-02 1967-11-07 2 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
US3331992A Control apparatus Expired / Lapsed 1964-08-10 1967-07-18 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
US3299536A Image combining apparatus Expired / Lapsed 1964-12-30 1967-01-24 2 Details
US3299714A Balancing apparatus Expired / Lapsed 1964-01-15 1967-01-24 2 Details
US3300696A Tracer control apparatus with means to correct position err… Expired / Lapsed 1963-10-15 1967-01-24 2 Details
US3298674A Air treating apparatus Expired / Lapsed 1965-05-10 1967-01-17 2 Details
US3295079A Solenoid actuator assembly having a unitary spring clip for… Expired / Lapsed 1964-12-03 1966-12-27 1 Details
US3295126A Electrical apparatus Expired / Lapsed 1963-10-22 1966-12-27 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
US3281806A Pulse width modulation representation of paired binary digi… Expired / Lapsed 1962-12-21 1966-10-25 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
US3267744A Control apparatus Expired / Lapsed 1963-03-18 1966-08-23 2 Details
US3267429A Digital to pulse comparator apparatus Expired / Lapsed 1963-09-16 1966-08-16 2 Details
US3263093A Ramp generator employing constant current sink means contro… Expired / Lapsed 1963-10-02 1966-07-26 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
US3252010A Scr control circuit gated by unijunction transistor relaxat… Expired / Lapsed 1964-03-16 1966-05-17 2 Details
US3252110A Laser end mirror alignment apparatus Expired / Lapsed 1962-12-27 1966-05-17 2 Details
US3248664A System for synchronizing a local clock generator with binar… Expired / Lapsed 1963-11-20 1966-04-26 2 Details
US3248654A Temperature compensated computer Expired / Lapsed 1963-05-07 1966-04-26 0 Details
US3246292A Echo check with time-phased input data sampling means Expired / Lapsed 1961-10-04 1966-04-12 2 Details
US3243609A Semiconductor apparatus Expired / Lapsed 1964-07-24 1966-03-29 0 Details
US3243803A Radar altimeter tracking apparatus Expired / Lapsed 1964-03-23 1966-03-29 2 Details
US3242729A Electrolytic flowmeter Expired / Lapsed 1963-06-17 1966-03-29 2 Details
US3242489A Radar tracking apparatus Expired / Lapsed 1964-03-04 1966-03-22 1 Details
US3240866A Self-repair circuit apparatus Expired / Lapsed 1963-08-12 1966-03-15 2 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
US3235714A Information handling apparatus Expired / Lapsed 1961-07-24 1966-02-15 2 Details
CA726863A Polarographic cell Expired / Lapsed — 1966-02-01 0 Details
CA727217A Electrical apparatus Expired / Lapsed — 1966-02-01 0 Details
US3233161A Saturable reactor and transistor bridge voltage control app… Expired / Lapsed 1962-05-18 1966-02-01 1 Details
US3230763A Semiconductor pressure diaphragm Expired / Lapsed 1962-12-27 1966-01-25 1 Details
US3229190A Transistor chopper Expired / Lapsed 1961-08-21 1966-01-11 2 Details
US3225216A Control apparatus including a switch and both positive and … Expired / Lapsed 1962-09-06 1965-12-21 2 Details
US3224436A Hypodermic apparatus for measuring hydrogen ion concentrati… Expired / Lapsed 1961-04-10 1965-12-21 2 Details
US3222531A Solid state junction photopotentiometer Expired / Lapsed 1962-06-26 1965-12-07 1 Details
US3222501A Sprocket hole checking system Expired / Lapsed 1961-10-02 1965-12-07 2 Details
US3221310A Parity bit indicator Expired / Lapsed 1960-07-11 1965-11-30 1 Details
US3218864A Force ratio apparatus Expired / Lapsed 1962-08-07 1965-11-23 0 Details
US3217152A Selectively variable sequential signal generator Expired / Lapsed 1961-02-23 1965-11-09 2 Details
US3215348A Multi-stage temperature control apparatus Expired / Lapsed 1963-06-03 1965-11-02 1 Details
US3213385A Control apparatus for preventing amplifier saturation Expired / Lapsed 1961-11-02 1965-10-19 2 Details
US3211087A Hammer control circuit in a high speed printer Expired / Lapsed 1961-11-28 1965-10-12 1 Details
US3210548A Semiconductor light position indicators and scanners Expired / Lapsed 1962-11-15 1965-10-05 1 Details
US3206651A Circuit controlling flow of current Expired / Lapsed 1961-11-30 1965-09-14 2 Details
US3205158A Condition responsive devices Expired / Lapsed 1962-10-04 1965-09-07 2 Details
US3204118A Voltage control apparatus Expired / Lapsed 1961-10-17 1965-08-31 2 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
US3191135A Self-mounting electrical apparatus Expired / Lapsed 1963-04-15 1965-06-22 2 Details
US3187254A Control apparatus with magnetoresistive pickoff means Expired / Lapsed 1961-04-06 1965-06-01 2 Details
US3181171A Indicating and recording apparatus Expired / Lapsed 1962-05-31 1965-04-27 2 Details
US3178562A Control apparatus Expired / Lapsed 1962-06-08 1965-04-13 1 Details
US3177330A Relay with improved electrical contact structure Expired / Lapsed 1961-12-12 1965-04-06 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
US3161863A Flame detecting apparatus with flame simulation test Expired / Lapsed 1961-09-07 1964-12-15 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
US3140470A Error checking circuit for a plurality of parallel data tra… Expired / Lapsed 1958-08-04 1964-07-07 2 Details
US3139562A Voltage monitoring circuit Expired / Lapsed 1960-10-17 1964-06-30 2 Details
US3138792A Supervisory system Expired / Lapsed 1960-05-26 1964-06-23 1 Details
US3138750A Programmed machine with malfunction detection and control a… Expired / Lapsed 1959-11-17 1964-06-23 2 Details
US3135861A Air data computing apparatus Expired / Lapsed 1957-02-28 1964-06-02 2 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
US3127909A Rotary gate valve Expired / Lapsed 1962-07-18 1964-04-07 1 Details
US3113749A Aircraft automatic control apparatus Expired / Lapsed 1960-12-15 1963-12-10 2 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
US3107138A Oscillograph containing a silver halide recording medium pl… Expired / Lapsed 1957-08-30 1963-10-15 2 Details
US3103652A Supervisory system Expired / Lapsed 1961-10-02 1963-09-10 2 Details
US3092807A Check number generator Expired / Lapsed 1958-11-24 1963-06-04 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
US3088087A Electrical apparatus Expired / Lapsed 1960-06-27 1963-04-30 2 Details
US3088073A Spurious signal eliminator utilizing a three winding transf… Expired / Lapsed 1960-04-27 1963-04-30 2 Details
US3083930A Winding form Expired / Lapsed 1959-08-13 1963-04-02 1 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
US3075175A Check number generating circuitry for information handling … Expired / Lapsed 1958-11-24 1963-01-22 2 Details
US3072326A Fluid-pressure-operated computer Expired / Lapsed 1960-01-29 1963-01-08 2 Details
US3072846A Analog to digital converter Expired / Lapsed 1959-01-16 1963-01-08 0 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
US3064128A Measuring apparatus Expired / Lapsed 1958-10-17 1962-11-13 0 Details
US3063036A Information handling apparatus Expired / Lapsed 1958-09-08 1962-11-06 0 Details
CA651279A Alarm sensing Expired / Lapsed — 1962-10-30 0 Details
US3060602A Control apparatus Expired / Lapsed 1960-07-22 1962-10-30 0 Details
US3059111A Measuring apparatus Expired / Lapsed 1959-11-12 1962-10-16 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
US3056120A Supervised condition detection and alarm apparatus Expired / Lapsed 1960-09-12 1962-09-25 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
US3051873A Temperature compensated transistor circuit Expired / Lapsed 1954-11-17 1962-08-28 0 Details
US3050644A Transistor decision amplifier with temperature compensating… Expired / Lapsed 1959-12-10 1962-08-21 0 Details
US3049284A Continuously operated compressor Expired / Lapsed 1960-05-18 1962-08-14 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
US3041479A Signal processing apparatus Expired / Lapsed 1957-12-31 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
US3030979A Induction fluid amplifier Expired / Lapsed 1960-11-16 1962-04-24 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
US3024148A Methods of chemically polishing germanium Expired / Lapsed 1957-08-30 1962-03-06 2 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
US3020413A Condition responsive means Expired / Lapsed 1960-09-06 1962-02-06 0 Details
US3019647A Electrical fluid-flow measuring apparatus Expired / Lapsed 1957-08-30 1962-02-06 0 Details
US3018712A Control system for a room closing air curtain Expired / Lapsed 1958-05-12 1962-01-30 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
US3016197A Square root extracting integrator Expired / Lapsed 1958-09-15 1962-01-09 0 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
US2999424A Slide changer apparatus Expired / Lapsed 1960-11-01 1961-09-12 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
US2990519A Transistor oscillator Expired / Lapsed 1957-11-04 1961-06-27 0 Details
US2989076A Roller actuated valve Expired / Lapsed 1957-08-30 1961-06-20 0 Details
US2988702A Electronic memory amplifier Expired / Lapsed 1959-12-24 1961-06-13 0 Details
US2987920A Fluid pressure telemtering apparatus Expired / Lapsed 1955-07-07 1961-06-13 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
US2982908A Sensing apparatus Expired / Lapsed 1957-11-12 1961-05-02 0 Details
US2981471A Information manipulating apparatus Expired / Lapsed 1957-12-09 1961-04-25 0 Details
US2980381A Support apparatus Expired / Lapsed 1957-09-26 1961-04-18 0 Details
US2979626A Pulse generator having conditionresponsive timing means Expired / Lapsed 1958-06-09 1961-04-11 0 Details
US2977765A Servo motor control apparatus Expired / Lapsed 1959-12-23 1961-04-04 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
US2968181A Liquid quantity measuring apparatus Expired / Lapsed 1956-05-28 1961-01-17 0 Details
US2967276A Electrical pulse manipulating apparatus Expired / Lapsed 1956-08-01 1961-01-03 0 Details
US2967279A Phototransistor modulating apparatus Expired / Lapsed 1956-05-21 1961-01-03 0 Details
US2965833A Semiconductor voltage regulator apparatus Expired / Lapsed 1958-03-10 1960-12-20 0 Details
US2964693A Current regulator Expired / Lapsed 1955-08-17 1960-12-13 0 Details
US2962645A Automatic duplicating control apparatus Expired / Lapsed 1957-07-03 1960-11-29 0 Details
US2960294A Control apparatus Expired / Lapsed 1954-12-01 1960-11-15 0 Details
US2960678A Ultrasonic level measuring apparatus Expired / Lapsed 1953-10-06 1960-11-15 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
US2950431A Servomotor control apparatus for dirigible craft Expired / Lapsed 1957-10-28 1960-08-23 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
US2944199A Measuring apparatus Expired / Lapsed 1956-12-27 1960-07-05 0 Details
US2941399A Aircraft instruments Expired / Lapsed 1957-03-18 1960-06-21 0 Details
US2940462A Pressure regulating valve Expired / Lapsed 1957-03-13 1960-06-14 0 Details
US2938536A Controller Expired / Lapsed 1957-10-29 1960-05-31 0 Details
US2938174A Condition responsive apparatus Expired / Lapsed 1955-09-14 1960-05-24 0 Details
US2938173A Measuring circuit using modulated transistor oscillator wit… Expired / Lapsed 1955-05-16 1960-05-24 0 Details
US2937369A Electrical signal measuring apparatus Expired / Lapsed 1955-12-29 1960-05-17 0 Details
US2935650A Photographic flash apparatus Expired / Lapsed 1958-12-29 1960-05-03 0 Details
US2935698A Oscillator Expired / Lapsed 1958-03-19 1960-05-03 0 Details
US2934996A Photographic exposure meter Expired / Lapsed 1957-01-28 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
US2926696A Hydraulic control apparatus Expired / Lapsed 1957-05-09 1960-03-01 0 Details
US2925241A Diaphragm operated gate valve Expired / Lapsed 1957-06-17 1960-02-16 0 Details
US2922897A Transistor circuit Expired / Lapsed 1956-01-30 1960-01-26 0 Details
US2921362A Process for the production of semiconductor devices Expired / Lapsed 1955-06-27 1960-01-19 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
US2915078A Flapper nozzle combination with a variable nozzle restricti… Expired / Lapsed 1956-10-17 1959-12-01 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
US2907931A Control apparatus Expired / Lapsed 1954-07-09 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
US2896204A Navigation system Expired / Lapsed 1954-09-27 1959-07-21 0 Details
US2889460A Electrical apparatus Expired / Lapsed 1956-01-26 1959-06-02 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
US2887642A Damped servomotor system Expired / Lapsed 1955-09-21 1959-05-19 0 Details
US2886755A Servomotor system control apparatus Expired / Lapsed 1955-05-24 1959-05-12 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
US2882352A D. c. amplifier system Expired / Lapsed 1954-11-19 1959-04-14 0 Details
US2881408A Inductive coupling for sonar apparatus Expired / Lapsed 1955-02-04 1959-04-07 0 Details
US2881332A Control apparatus Expired / Lapsed 1954-11-17 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
US2873075A Autoamtic hovering control system Expired / Lapsed 1954-05-24 1959-02-10 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
US2868458A Electrical control apparatus Expired / Lapsed 1952-11-28 1959-01-13 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
US2864904A Semi-conductor circuit Expired / Lapsed 1955-11-29 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
US2864066A Transducer Expired / Lapsed 1954-09-29 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
US2861493A Apparatus for measuring the light rotatory power of an opti… Expired / Lapsed 1953-01-29 1958-11-25 0 Details
US2860606A Servo control valve Expired / Lapsed 1954-11-17 1958-11-18 0 Details
US2851047A Controller Expired / Lapsed 1955-02-14 1958-09-09 0 Details
US2851048A Regulation control system for minimizing and/or maximizing … Expired / Lapsed 1955-02-07 1958-09-09 0 Details
US2848306A Humidity determination Expired / Lapsed 1954-09-23 1958-08-19 2 Details
US2847660A Servo apparatus Expired / Lapsed 1953-10-02 1958-08-12 0 Details
US2842331A Pinch-off valve Expired / Lapsed 1955-10-26 1958-07-08 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
US2833970A Self centering altitude controller for aircraft Expired / Lapsed 1953-07-13 1958-05-06 0 Details
US2831820A Foamed epoxy resin composition and method of making Expired / Lapsed 1953-04-13 1958-04-22 2 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
US2824278A Liquid level sensing apparatus Expired / Lapsed 1954-10-01 1958-02-18 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
US2814743A Combined torquer and pick-off Expired / Lapsed 1956-09-06 1957-11-26 0 Details
US2814689A Differential pressure switch Expired / Lapsed 1955-04-25 1957-11-26 0 Details
US2812398A Acceleration responsive device Expired / Lapsed 1955-08-15 1957-11-05 0 Details
US2811856A Temperature measuring apparatus Expired / Lapsed 1946-03-29 1957-11-05 0 Details
US2811573A Transformer pressure relief devices Expired / Lapsed 1952-06-16 1957-10-29 0 Details
US2807758A Transistor flame detector Expired / Lapsed 1954-07-30 1957-09-24 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
US2793813A Measuring and controlling apparatus Expired / Lapsed 1953-07-23 1957-05-28 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
US2787678A Acceleration responsive device Expired / Lapsed 1954-09-22 1957-04-02 0 Details
US2787428A Air traffic control apparatus Expired / Lapsed 1948-06-17 1957-04-02 0 Details
US2785860A Measuring and controlling apparatus using a radiation pyrom… Expired / Lapsed 1949-05-14 1957-03-19 0 Details
US2785256A Switch mechanism Expired / Lapsed 1952-10-18 1957-03-12 0 Details
US2779931A Method and apparatus for measuring speed Expired / Lapsed 1954-02-08 1957-01-29 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
US2774878A Oscillators Expired / Lapsed 1955-08-29 1956-12-18 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
US2751918A Manually or automatically actuated air-pressure-responsive … Expired / Lapsed 1950-12-28 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
US2749447A Fuel burner control apparatus Expired / Lapsed 1952-01-25 1956-06-05 0 Details
US2745285A Temperature measuring apparatus Expired / Lapsed 1952-10-21 1956-05-15 0 Details
US2742916A Measuring and controlling apparatus Expired / Lapsed 1952-07-31 1956-04-24 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
US2724795A Electronic motor control apparatus Expired / Lapsed 1952-03-15 1955-11-22 0 Details
US2724398A Proportional speed floating controller Expired / Lapsed 1950-03-14 1955-11-22 0 Details
US2724040A Control apparatus Expired / Lapsed 1950-08-17 1955-11-15 0 Details
US2721276A Condition sensing apparatus Expired / Lapsed 1952-11-19 1955-10-18 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
US2701576A Air-operated manually or automatically set controller Expired / Lapsed 1949-10-29 1955-02-08 0 Details
US2701111A Cruise control apparatus Expired / Lapsed 1951-09-22 1955-02-01 0 Details
US2698023A Fluid relay Expired / Lapsed 1947-11-15 1954-12-28 0 Details
US2697417A Measuring apparatus Expired / Lapsed 1951-12-07 1954-12-21 0 Details
US2696119A Temperature indicating apparatus Expired / Lapsed 1951-12-12 1954-12-07 0 Details
US2695661A Component checking burner control apparatus for standing pi… Expired / Lapsed 1951-01-12 1954-11-30 0 Details
US2694780A Interconnected generating systems control Expired / Lapsed 1952-02-26 1954-11-16 0 Details
US2694169A Electric proportioning control apparatus with automatic res… Expired / Lapsed 1950-05-05 1954-11-09 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
US2682051A Glide path shaping system for blind landing equipment Expired / Lapsed 1949-10-26 1954-06-22 0 Details
US2674708A Damping arrangement for electric motor follow-up systems Expired / Lapsed 1951-10-29 1954-04-06 0 Details
US2672880A Fluid flow control apparatus Expired / Lapsed 1951-08-30 1954-03-23 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
US2666584A Combustion control apparatus Expired / Lapsed 1950-12-18 1954-01-19 0 Details
US2666585A Distance adjusted pneumatic control system Expired / Lapsed 1948-09-11 1954-01-19 0 Details
US2665749A Burner and coaxial flame rod assembly Expired / Lapsed 1949-11-10 1954-01-12 0 Details
US2663001A Variable limit switch assembly Expired / Lapsed 1952-10-13 1953-12-15 0 Details
US2662591A Burner control apparatus Expired / Lapsed 1950-04-03 1953-12-15 0 Details
US2661907A Control apparatus for steam heating systems Expired / Lapsed 1951-03-30 1953-12-08 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
US2654057A Electronic amplifying apparatus Expired / Lapsed 1950-08-21 1953-09-29 0 Details
US2653279A Control apparatus Expired / Lapsed 1952-03-26 1953-09-22 0 Details
US2648037A Measuring apparatus Expired / Lapsed 1950-02-18 1953-08-04 0 Details
US2647252A Control apparatus Expired / Lapsed 1949-07-26 1953-07-28 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
US2644052A Nonbounce switch Expired / Lapsed 1951-02-02 1953-06-30 0 Details
US2642474A Electrical connector Expired / Lapsed 1949-09-14 1953-06-16 0 Details
US2641664A Switch Expired / Lapsed 1948-09-18 1953-06-09 0 Details
US2640902A Temperature responsive control Expired / Lapsed 1952-06-27 1953-06-02 0 Details
US2640649A Thermostatic control apparatus for heating systems Expired / Lapsed 1949-06-25 1953-06-02 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
US2627370A Combustion engine pressure control apparatus Expired / Lapsed 1946-03-29 1953-02-03 0 Details
US2626657A Burner control apparatus with component checking means Expired / Lapsed 1949-06-27 1953-01-27 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
US2610677A Fuel burner safety control apparatus Expired / Lapsed 1948-08-23 1952-09-16 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
US2600476A Coercing means for gyroscopes Expired / Lapsed 1950-09-30 1952-06-17 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
US2592088A Electric proportioning controller with pneumatic reset Expired / Lapsed 1948-03-31 1952-04-08 0 Details
US2590020A Automatic pilot Expired / Lapsed 1945-06-27 1952-03-18 0 Details
US2588678A Measuring and controlling apparatus Expired / Lapsed 1947-12-19 1952-03-11 0 Details
US2588799A Manual transfer between automatic and manual regulating con… Expired / Lapsed 1947-10-14 1952-03-11 0 Details
US2581525A Temperature control apparatus Expired / Lapsed 1948-07-17 1952-01-08 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
US2564937A Control apparatus Expired / Lapsed 1946-08-31 1951-08-21 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
US2564569A Diaphragm control valve Expired / Lapsed 1945-07-13 1951-08-14 0 Details
US2563281A Liquid measuring condenser Expired / Lapsed 1946-04-15 1951-08-07 0 Details
US2563280A Liquid level measuring apparatus Expired / Lapsed 1945-01-29 1951-08-07 0 Details
US2562538A Temperature measuring apparatus Expired / Lapsed 1947-02-01 1951-07-31 0 Details
US2561612A Cathode-ray tube apparatus for comparing two electrical sig… Expired / Lapsed 1945-05-10 1951-07-24 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
US2558683A Audible indicating measuring apparatus Expired / Lapsed 1945-05-30 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
US2548939A Control apparatus Expired / Lapsed 1946-05-27 1951-04-17 0 Details
US2543384A Hygroscopic control device Expired / Lapsed 1948-03-29 1951-02-27 0 Details
US2542264A Electrical timing apparatus Expired / Lapsed 1949-02-07 1951-02-20 0 Details
US2538415A Electric motor control system Expired / Lapsed 1945-04-19 1951-01-16 0 Details
US2537932A Linear force balance angle of attack sensing device Expired / Lapsed 1948-10-11 1951-01-09 0 Details
US2537292A Component checking circuit for burner control apparatus Expired / Lapsed 1948-08-09 1951-01-09 0 Details
US2537293A Burner safety control apparatus Expired / Lapsed 1948-05-06 1951-01-09 0 Details
US2537315A Outlet control Expired / Lapsed 1945-03-01 1951-01-09 0 Details
US2535147A Electronic control circuits Expired / Lapsed 1948-05-29 1950-12-26 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
US2529490A Motor control system Expired / Lapsed 1948-11-12 1950-11-14 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
US2523017A Detonation detector system Expired / Lapsed 1946-04-11 1950-09-19 0 Details
US2522348A Electronic amplifier Expired / Lapsed 1948-07-16 1950-09-12 0 Details
US2519615A Analyzing apparatus Expired / Lapsed 1947-08-19 1950-08-22 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
US2495856A Control apparatus Expired / Lapsed 1946-04-06 1950-01-31 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
US2490932A Control apparatus Expired / Lapsed 1945-05-31 1949-12-13 0 Details
US2491380A Control apparatus Expired / Lapsed 1944-07-15 1949-12-13 0 Details
US2490628A Motor-driven leveling support Expired / Lapsed 1942-09-23 1949-12-06 0 Details
US2489999A Recalibrating motor control system Expired / Lapsed 1946-12-07 1949-11-29 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
US2476558A Apparatus for molding plastics Expired / Lapsed 1946-02-23 1949-07-19 0 Details
US2476496A Condition regulating apparatus Expired / Lapsed 1944-07-14 1949-07-19 0 Details
US2476400A Flow controlling device Expired / Lapsed 1943-07-12 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
US2471393A Electrical control instrument Expired / Lapsed 1946-08-31 1949-05-24 0 Details
US2470968A Rheostat control device Expired / Lapsed 1945-06-27 1949-05-24 0 Details
US2470434A Analyzing method and apparatus Expired / Lapsed 1945-03-27 1949-05-17 0 Details
US2456765A Hot-wire bridge overspeed controller Expired / Lapsed 1945-04-18 1948-12-21 0 Details
US2455350A Control device Expired / Lapsed 1942-07-11 1948-12-07 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
US2444549A Polynomial equation computer Expired / Lapsed 1944-10-28 1948-07-06 0 Details
US2444733A Impedance bridge Expired / Lapsed 1944-10-27 1948-07-06 0 Details
US2444568A Electronic control circuit Expired / Lapsed 1943-03-26 1948-07-06 0 Details
US2443347A Electronic control circuits Expired / Lapsed 1942-11-19 1948-06-15 0 Details
US2442469A Sensitive resistance device Expired / Lapsed 1943-11-26 1948-06-01 0 Details
US2441269A Electron discharge compass system Expired / Lapsed 1943-05-31 1948-05-11 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
US2435965A Electrical motor control apparatus Expired / Lapsed 1942-10-09 1948-02-17 0 Details
US2433574A Hot gas defrosting Expired / Lapsed 1942-04-30 1947-12-30 0 Details
US2433326A Pressure control apparatus Expired / Lapsed 1944-05-19 1947-12-23 0 Details
US2425733A Electronic control apparatus for positioned device Expired / Lapsed 1942-11-18 1947-08-19 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
US2422162A Control system Expired / Lapsed 1944-02-25 1947-06-10 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
US2398008A Burner control mechanism Expired / Lapsed 1943-03-26 1946-04-09 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
US2387792A Valve Expired / Lapsed 1939-12-11 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
US2379872A Electronic control apparatus Expired / Lapsed 1943-01-09 1945-07-10 0 Details
US2379871A Burner control device Expired / Lapsed 1942-08-19 1945-07-10 0 Details
US2375988A Control apparatus Expired / Lapsed 1941-08-28 1945-05-15 0 Details
US2373255A Supervisory apparatus Expired / Lapsed 1943-06-24 1945-04-10 0 Details
US2373241A Amplifier circuit Expired / Lapsed 1942-11-18 1945-04-10 0 Details
US2372839A Air conditioning system Expired / Lapsed 1941-12-06 1945-04-03 0 Details
US2371669A Switch Expired / Lapsed 1942-04-06 1945-03-20 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
US2356261A Refrigeration Expired / Lapsed 1942-03-25 1944-08-22 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
US2350615A Pneumatic control device Expired / Lapsed 1942-06-10 1944-06-06 0 Details
US2343467A Air conditioning control system Expired / Lapsed 1941-06-28 1944-03-07 0 Details
US2342211A Utilization of natural heating and cooling effects Expired / Lapsed 1941-10-17 1944-02-22 0 Details
US2342390A Combination switch Expired / Lapsed 1941-02-19 1944-02-22 0 Details
US2340004A Control system Expired / Lapsed 1941-11-15 1944-01-25 0 Details
US2336408A Thermostat Expired / Lapsed 1940-09-30 1943-12-07 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
US2334216A Temperature control system Expired / Lapsed 1938-04-04 1943-11-16 0 Details
US2333913A Valve mechanism Expired / Lapsed 1942-07-11 1943-11-09 0 Details
US2333775A Control valve Expired / Lapsed 1938-07-08 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
US2324642A Electromagnetic valve operator Expired / Lapsed 1940-05-03 1943-07-20 0 Details
US2320881A Control apparatus Expired / Lapsed 1940-08-03 1943-06-01 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
US2310293A Condition responsive controller Expired / Lapsed 1941-04-18 1943-02-09 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
US2299533A Temperature responsive device Expired / Lapsed 1941-07-05 1942-10-20 0 Details
US2299404A Automatically operated valve Expired / Lapsed 1939-10-28 1942-10-20 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
US2293557A Air conditioning system Expired / Lapsed 1939-06-12 1942-08-18 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
US2291805A Burner control system Expired / Lapsed 1938-11-17 1942-08-04 0 Details
US2291840A Automatic control for stokers Expired / Lapsed 1938-01-08 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
US2281399A Heat control Expired / Lapsed 1939-01-07 1942-04-28 0 Details
US2280062A Motorized mechanism Expired / Lapsed 1939-12-11 1942-04-21 0 Details
US2277138A Air conditioning system Expired / Lapsed 1938-08-31 1942-03-24 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
US2268769A Air conditioning system Expired / Lapsed 1939-05-06 1942-01-06 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
US2266185A Fluid fuel burner control system Expired / Lapsed 1938-08-12 1941-12-16 0 Details
US2266238A Air conditioning system Expired / Lapsed 1938-02-07 1941-12-16 0 Details
US2263858A Screw feeding device Expired / Lapsed 1937-07-26 1941-11-25 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
US2254185A Air conditioning system Expired / Lapsed 1939-12-28 1941-08-26 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
US2242183A Fuel burner control system Expired / Lapsed 1939-06-21 1941-05-13 0 Details
US2240812A Safety switch Expired / Lapsed 1938-07-08 1941-05-06 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
US2238689A Air conditioning system Expired / Lapsed 1937-03-13 1941-04-15 0 Details
US2238219A Temperature controlling device Expired / Lapsed 1936-08-27 1941-04-15 0 Details
US2234633A Air conditioning system Expired / Lapsed 1940-04-19 1941-03-11 0 Details
US2232934A Control valve Expired / Lapsed 1938-06-18 1941-02-25 0 Details
US2231420A Burner control system Expired / Lapsed 1938-09-30 1941-02-11 0 Details
US2231764A Viscosity control device Expired / Lapsed 1937-12-22 1941-02-11 0 Details
US2228997A Fluid fuel burner control system Expired / Lapsed 1939-02-16 1941-01-14 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
US2226510A Air conditioning system Expired / Lapsed 1937-08-06 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
US2223283A Temperature control system Expired / Lapsed 1937-08-27 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
US2220061A Effective temperature control Expired / Lapsed 1937-12-08 1940-11-05 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
US2211573A Heating system Expired / Lapsed 1938-01-13 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
US2200118A Air conditioning system Expired / Lapsed 1936-10-15 1940-05-07 0 Details
US2199910A Proportioning control system Expired / Lapsed 1930-03-07 1940-05-07 0 Details
US2196687A Air conditioning system Expired / Lapsed 1937-01-16 1940-04-09 0 Details
US2192859A Stoker control system Expired / Lapsed 1938-01-08 1940-03-05 0 Details
US2191640A Radiant heat sensitive device Expired / Lapsed 1937-12-22 1940-02-27 0 Details
US2192144A Temperature control system Expired / Lapsed 1936-10-15 1940-02-27 0 Details
US2188565A Fuel burner control system Expired / Lapsed 1938-08-08 1940-01-30 0 Details
US2188438A Switching mechanism Expired / Lapsed 1937-05-07 1940-01-30 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
US2181427A Temperature control system Expired / Lapsed 1936-01-02 1939-11-28 0 Details
US2177602A Air conditioning system Expired / Lapsed 1936-05-11 1939-10-24 0 Details
US2177496A Air conditioning system Expired / Lapsed 1936-02-28 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
US2172820A Thermostat Expired / Lapsed 1936-08-28 1939-09-12 0 Details
US2172487A Load compensated control system Expired / Lapsed 1935-12-19 1939-09-12 0 Details
US2170072A Control system Expired / Lapsed 1936-11-04 1939-08-22 0 Details
US2170497A Fuel combustion control system Expired / Lapsed 1936-01-29 1939-08-22 0 Details
US2167227A Relay circuit Expired / Lapsed 1938-06-02 1939-07-25 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
US2154511A Air conditioning mechanism Expired / Lapsed 1935-09-16 1939-04-18 0 Details
US2150117A Motor control system Expired / Lapsed 1937-11-15 1939-03-07 0 Details
US2149542A Temperature control Expired / Lapsed 1936-04-01 1939-03-07 0 Details
US2147604A Heating system Expired / Lapsed 1935-04-15 1939-02-14 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
US2140451A Control mechanism Expired / Lapsed 1934-12-20 1938-12-13 0 Details
US2135991A Time and remote control system Expired / Lapsed 1935-08-24 1938-11-08 0 Details
US2126182A Air conditioning system Expired / Lapsed 1935-09-05 1938-08-09 0 Details
US2118886A Fuel burner control system Expired / Lapsed 1936-06-27 1938-05-31 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
US2083612A Temperature changing system employing plural temperature ch… Expired / Lapsed 1934-05-02 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
US2073326A Temperature control system Expired / Lapsed 1935-09-05 1937-03-09 0 Details
US2045790A Unit heater control Expired / Lapsed 1934-04-23 1936-06-30 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
US1916814A Radiator valve Expired / Lapsed 1930-12-18 1933-07-04 0 Details
US1907093A Grid-glow potentiometer Expired / Lapsed 1930-02-12 1933-05-02 0 Details
US1899254A Electrical connection Expired / Lapsed 1929-03-09 1933-02-28 0 Details
US1880524A Circuit control means Expired / Lapsed 1931-07-15 1932-10-04 0 Details
US1878010A Apparatus for controlling burners Expired / Lapsed 1925-06-19 1932-09-20 0 Details
US1877605A Opposed motor control system Expired / Lapsed 1931-05-16 1932-09-13 0 Details
US1853196A Gas burner control system Expired / Lapsed 1928-04-09 1932-04-12 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