Bendix Aviation Corp
Bendix AviActive Patents
0
Total Holdings
551
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| GB832658A | A system for preventing mismating between pluggable electri… | Expired / Lapsed | 1958-02-17 | — | 0 | Details |
| DE1003595B | Hydraulic servo system for manual and automatic control | Expired / Lapsed | 1955-08-06 | — | 0 | Details |
| GB768387A | Electric switching apparatus | Expired / Lapsed | 1954-11-30 | — | 0 | Details |
| GB735835A | Improvements in or relating to flexible conduits | Expired / Lapsed | 1953-09-29 | — | 0 | Details |
| GB730070A | Improvements in or relating to electrical connectors | Expired / Lapsed | 1953-02-26 | — | 0 | Details |
| GB597579A | Improvements in or relating to remote tachometer drives | Expired / Lapsed | 1945-01-15 | — | 0 | Details |
| GB576167A | Improvements in or relating to fluid pressure regulating va… | Expired / Lapsed | 1944-01-24 | — | 0 | Details |
| GB574819A | Apparatus for testing the density of fluids | Expired / Lapsed | 1943-08-20 | — | 0 | Details |
| GB523895A | Improvements in or relating to the feeding of fuel to inter… | Expired / Lapsed | 1938-10-17 | — | 0 | Details |
| CA635428A | Fuel injection system | Expired / Lapsed | — | 1962-01-30 | 0 | Details |
| US2949258A | Monitoring apparatus for automatic pilot systems | Expired / Lapsed | 1953-06-30 | 1960-08-16 | 0 | Details |
| US2947419A | Filter and method of making | Expired / Lapsed | 1955-05-26 | 1960-08-02 | 0 | Details |
| US2947141A | Fuel feed and power control system for gas turbine engines | Expired / Lapsed | 1954-01-04 | 1960-08-02 | 0 | Details |
| US2946981A | Sonic transducers for fluid mediums | Expired / Lapsed | 1956-01-03 | 1960-07-26 | 0 | Details |
| US2945449A | Hydraulic control pump | Expired / Lapsed | 1954-06-03 | 1960-07-19 | 0 | Details |
| US2939287A | Tracer control system | Expired / Lapsed | 1956-05-25 | 1960-06-07 | 0 | Details |
| US2937354A | Thermally-sensitive resistor | Expired / Lapsed | 1957-08-02 | 1960-05-17 | 0 | Details |
| US2936427A | Transistor sweep circuit | Expired / Lapsed | 1958-02-24 | 1960-05-10 | 0 | Details |
| US2934050A | Driver circuit for fuel injector | Expired / Lapsed | 1956-09-10 | 1960-04-26 | 0 | Details |
| US2933689A | Gated amplitude discriminator | Expired / Lapsed | 1958-04-04 | 1960-04-19 | 0 | Details |
| US2933704A | Tank circuit for radio-frequency transmitters and the like … | Expired / Lapsed | 1957-01-09 | 1960-04-19 | 0 | Details |
| US2927668A | Switch control mechanism | Expired / Lapsed | 1956-06-27 | 1960-03-08 | 0 | Details |
| US2921204A | Data converter | Expired / Lapsed | 1957-12-16 | 1960-01-12 | 0 | Details |
| US2920195A | Valve sensing trigger for fuel injection system | Expired / Lapsed | 1957-09-17 | 1960-01-05 | 0 | Details |
| US2920264A | Saturable transformer mixing and amplifying device | Expired / Lapsed | 1954-09-10 | 1960-01-05 | 0 | Details |
| US2915650A | Ramp wave generator | Expired / Lapsed | 1957-09-11 | 1959-12-01 | 0 | Details |
| US2914682A | Demodulator | Expired / Lapsed | 1955-02-10 | 1959-11-24 | 0 | Details |
| US2911966A | Acceleration control for fuel injector | Expired / Lapsed | 1956-09-07 | 1959-11-10 | 0 | Details |
| US2906926A | Time delay circuit | Expired / Lapsed | 1957-01-07 | 1959-09-29 | 0 | Details |
| US2907020A | Digi-graphic recorder | Expired / Lapsed | 1955-10-10 | 1959-09-29 | 0 | Details |
| US2905871A | Torque tube torque motor | Expired / Lapsed | 1957-10-30 | 1959-09-22 | 0 | Details |
| US2900967A | Fuel supply system | Expired / Lapsed | 1957-03-11 | 1959-08-25 | 0 | Details |
| US2901683A | Damping arrangement for autopilot servosystems | Expired / Lapsed | 1953-04-24 | 1959-08-25 | 0 | Details |
| US2897304A | Humidistat | Expired / Lapsed | 1958-11-13 | 1959-07-28 | 0 | Details |
| US2889509A | System for returning a craft to level flight | Expired / Lapsed | 1957-10-28 | 1959-06-02 | 0 | Details |
| US2888067A | Mechanism for controlling fuel to a gas turbine engine | Expired / Lapsed | 1952-04-11 | 1959-05-26 | 0 | Details |
| US2884916A | Fuel supply system | Expired / Lapsed | 1957-12-13 | 1959-05-05 | 0 | Details |
| FR1177677A | Pressure converter | Expired / Lapsed | 1957-07-02 | 1959-04-28 | 0 | Details |
| US2883650A | System for reproducing a varying d. c. voltage at a distance | Expired / Lapsed | 1953-08-21 | 1959-04-21 | 0 | Details |
| US2883128A | Aircraft elevator controls during turns | Expired / Lapsed | 1953-06-05 | 1959-04-21 | 0 | Details |
| US2881587A | Electrical apparatus having means to control the supply of … | Expired / Lapsed | 1955-08-23 | 1959-04-14 | 0 | Details |
| US2880770A | Power operated screw driver | Expired / Lapsed | 1957-04-18 | 1959-04-07 | 0 | Details |
| US2880706A | Servo-motor having chatter eliminating means | Expired / Lapsed | 1956-09-27 | 1959-04-07 | 0 | Details |
| US2880982A | Vacuum furnace | Expired / Lapsed | 1955-12-19 | 1959-04-07 | 0 | Details |
| US2878351A | Heated thermistor | Expired / Lapsed | 1953-07-02 | 1959-03-17 | 0 | Details |
| US2873418A | Servosystem pitch control for aircraft | Expired / Lapsed | 1955-09-22 | 1959-02-10 | 0 | Details |
| US2872057A | Loader, unloader mechanism | Expired / Lapsed | 1956-06-27 | 1959-02-03 | 0 | Details |
| US2871436A | Directional control servosystem | Expired / Lapsed | 1955-04-21 | 1959-01-27 | 0 | Details |
| US2867200A | Auxiliary control means for pulse producing circuit | Expired / Lapsed | 1957-03-20 | 1959-01-06 | 0 | Details |
| US2867393A | Navigation device | Expired / Lapsed | 1950-01-11 | 1959-01-06 | 0 | Details |
| US2864592A | Liquid-vibrating apparatus | Expired / Lapsed | 1955-03-07 | 1958-12-16 | 0 | Details |
| US2859738A | Acceleration responsive switching circuit | Expired / Lapsed | 1956-09-28 | 1958-11-11 | 0 | Details |
| US2858700A | Ratiometer | Expired / Lapsed | 1953-10-15 | 1958-11-04 | 0 | Details |
| US2859005A | Monitoring system for aircraft auto pilots | Expired / Lapsed | 1952-11-21 | 1958-11-04 | 0 | Details |
| US2855244A | Sonic liquid-spraying and atomizing apparatus | Expired / Lapsed | 1955-06-03 | 1958-10-07 | 0 | Details |
| US2854763A | Navigation system | Expired / Lapsed | 1951-06-30 | 1958-10-07 | 0 | Details |
| US2848803A | Fastening device | Expired / Lapsed | 1955-07-19 | 1958-08-26 | 0 | Details |
| US2848869A | Fuel control system for gas turbine engines | Expired / Lapsed | 1953-10-26 | 1958-08-26 | 0 | Details |
| US2848614A | Regulated power supply | Expired / Lapsed | 1956-04-16 | 1958-08-19 | 0 | Details |
| US2848666A | Liquid level sensing capacitor | Expired / Lapsed | 1955-04-29 | 1958-08-19 | 0 | Details |
| US2845910A | Dual modulator for fuel injection system | Expired / Lapsed | 1957-07-22 | 1958-08-05 | 0 | Details |
| US2842731A | Control system for aircraft | Expired / Lapsed | 1955-09-22 | 1958-07-08 | 0 | Details |
| US2841729A | Magnetic electron multiplier | Expired / Lapsed | 1955-09-01 | 1958-07-01 | 0 | Details |
| US2840800A | Frequency error compensation in f. m. systems | Expired / Lapsed | 1955-05-12 | 1958-06-24 | 0 | Details |
| US2839915A | Method and apparatus for measuring viscosity, etc., of flui… | Expired / Lapsed | 1951-05-22 | 1958-06-24 | 0 | Details |
| US2837698A | Electrical apparatus | Expired / Lapsed | 1953-09-29 | 1958-06-03 | 0 | Details |
| US2836196A | Hydraulically-actuated 4-way valve | Expired / Lapsed | 1955-08-25 | 1958-05-27 | 0 | Details |
| US2836772A | Electronic component mounting assembly | Expired / Lapsed | 1955-05-12 | 1958-05-27 | 0 | Details |
| US2833968A | Magnetic actuator | Expired / Lapsed | 1954-04-05 | 1958-05-06 | 0 | Details |
| US2832915A | Alarm system responsive to sonic vibrations | Expired / Lapsed | 1953-09-14 | 1958-04-29 | 0 | Details |
| US2830279A | Electron discharge tube mounting | Expired / Lapsed | 1954-02-16 | 1958-04-08 | 0 | Details |
| US2830243A | Electrical control system | Expired / Lapsed | 1952-03-27 | 1958-04-08 | 0 | Details |
| US2826704A | Magnetic electron multiplier gate | Expired / Lapsed | 1955-01-03 | 1958-03-11 | 0 | Details |
| US2823345A | Direction-sensitive binary code position control system | Expired / Lapsed | 1953-10-16 | 1958-02-11 | 0 | Details |
| US2823344A | Direction-sensing code matching system for binary codes | Expired / Lapsed | 1953-10-02 | 1958-02-11 | 0 | Details |
| US2821702A | Apparatus for comparing successively occurring electrical p… | Expired / Lapsed | 1955-05-23 | 1958-01-28 | 0 | Details |
| US2815009A | Fuel injection control system | Expired / Lapsed | 1956-09-19 | 1957-12-03 | 0 | Details |
| US2815193A | Ultrasonic cleaning system | Expired / Lapsed | 1954-01-25 | 1957-12-03 | 0 | Details |
| US2810055A | Windshield heater control device and system | Expired / Lapsed | 1954-12-20 | 1957-10-15 | 0 | Details |
| US2807244A | Cold start overspeed control for fuel injection system | Expired / Lapsed | 1956-10-10 | 1957-09-24 | 0 | Details |
| US2806353A | Mach number computer | Expired / Lapsed | 1952-02-09 | 1957-09-17 | 0 | Details |
| US2801591A | Electro-magnetic pump | Expired / Lapsed | 1954-07-15 | 1957-08-06 | 0 | Details |
| US2797385A | Altimeter | Expired / Lapsed | 1952-09-15 | 1957-06-25 | 0 | Details |
| US2796565A | Electrical control system | Expired / Lapsed | 1952-03-27 | 1957-06-18 | 0 | Details |
| US2795696A | Flip-flop circuit | Expired / Lapsed | 1953-07-07 | 1957-06-11 | 0 | Details |
| US2790914A | Electrical apparatus for ignition and lighting | Expired / Lapsed | 1954-09-28 | 1957-04-30 | 0 | Details |
| US2790120A | Temperature responsive servomotor system | Expired / Lapsed | 1953-09-15 | 1957-04-23 | 0 | Details |
| US2787696A | Method of heating a windshield to remove and prevent ice ac… | Expired / Lapsed | 1952-03-01 | 1957-04-02 | 0 | Details |
| US2787777A | Ceramic transducer having stacked elements | Expired / Lapsed | 1952-02-18 | 1957-04-02 | 0 | Details |
| US2786460A | Fuel injection system | Expired / Lapsed | 1953-08-31 | 1957-03-26 | 0 | Details |
| US2784393A | Frequency multiplex telemetering system | Expired / Lapsed | 1954-02-26 | 1957-03-05 | 0 | Details |
| US2784013A | Hydraulic seal | Expired / Lapsed | 1953-12-21 | 1957-03-05 | 0 | Details |
| US2783647A | Ionizing true airspeed indicator | Expired / Lapsed | 1953-10-01 | 1957-03-05 | 0 | Details |
| US2783377A | Signal biased noise inverter for synch separator which canc… | Expired / Lapsed | 1951-11-08 | 1957-02-26 | 0 | Details |
| US2780687A | Humidistat | Expired / Lapsed | 1954-05-07 | 1957-02-05 | 0 | Details |
| US2777063A | Remote crystal switching for oscillators | Expired / Lapsed | 1953-09-30 | 1957-01-08 | 0 | Details |
| US2777070A | Servo compass | Expired / Lapsed | 1953-05-05 | 1957-01-08 | 0 | Details |
| US2774882A | Mass spectrometer | Expired / Lapsed | 1953-06-15 | 1956-12-18 | 0 | Details |
| US2774445A | Brake adjustor | Expired / Lapsed | 1951-10-31 | 1956-12-18 | 0 | Details |
| US2774414A | Fuel flow equalizer valve | Expired / Lapsed | 1950-04-26 | 1956-12-18 | 0 | Details |
| US2774559A | Positioning system monitor | Expired / Lapsed | 1949-12-15 | 1956-12-18 | 0 | Details |
| US2773944A | Amplifying system with stand-by channel | Expired / Lapsed | 1950-08-08 | 1956-12-11 | 0 | Details |
| US2773252A | Automatic pilot monitor | Expired / Lapsed | 1949-10-21 | 1956-12-04 | 0 | Details |
| US2769968A | Matrix type decoding circuit for binary code signals | Expired / Lapsed | 1953-07-13 | 1956-11-06 | 0 | Details |
| US2768580A | Reciprocating electromagnetic pump | Expired / Lapsed | 1955-01-25 | 1956-10-30 | 0 | Details |
| US2768357A | Tuning line | Expired / Lapsed | 1954-02-04 | 1956-10-23 | 0 | Details |
| US2767580A | Fluid flow indicating apparatus | Expired / Lapsed | 1952-02-26 | 1956-10-23 | 0 | Details |
| US2766732A | Master cylinder | Expired / Lapsed | 1950-03-21 | 1956-10-16 | 0 | Details |
| US2765670A | Automotive control mechanism | Expired / Lapsed | 1950-07-17 | 1956-10-09 | 0 | Details |
| US2765619A | Air-fuel ratio control system for ram-jet engines | Expired / Lapsed | 1950-05-03 | 1956-10-09 | 0 | Details |
| US2762006A | Control system | Expired / Lapsed | 1952-03-17 | 1956-09-04 | 0 | Details |
| US2762007A | Control system | Expired / Lapsed | 1950-11-03 | 1956-09-04 | 0 | Details |
| US2759361A | Dynamically balanced gauge | Expired / Lapsed | 1952-10-27 | 1956-08-21 | 0 | Details |
| US2760181A | Transducer having adjustable electrical impedance | Expired / Lapsed | 1951-10-08 | 1956-08-21 | 0 | Details |
| US2759689A | Automatic steering system | Expired / Lapsed | 1949-06-23 | 1956-08-21 | 0 | Details |
| US2755562A | Compass system | Expired / Lapsed | 1951-04-17 | 1956-07-24 | 0 | Details |
| US2750560A | Electron discharge tube | Expired / Lapsed | 1951-09-25 | 1956-06-12 | 0 | Details |
| US2749265A | Method of making pleated paper filter elements | Expired / Lapsed | 1953-11-05 | 1956-06-05 | 2 | Details |
| US2748355A | Altitude responsive signal generator | Expired / Lapsed | 1951-03-09 | 1956-05-29 | 0 | Details |
| FR1117494A | Fluid pump | Expired / Lapsed | 1954-12-09 | 1956-05-23 | 0 | Details |
| US2745614A | Aircraft control system | Expired / Lapsed | 1952-08-23 | 1956-05-15 | 0 | Details |
| US2746033A | Moving target indication system | Expired / Lapsed | 1950-12-13 | 1956-05-15 | 0 | Details |
| US2742758A | Starter control system | Expired / Lapsed | 1952-12-31 | 1956-04-24 | 0 | Details |
| US2743413A | Voltage regulator | Expired / Lapsed | 1952-04-04 | 1956-04-24 | 0 | Details |
| US2740112A | Automatic range gate | Expired / Lapsed | 1952-05-28 | 1956-03-27 | 0 | Details |
| US2739301A | Checking circuit for correct number of received information… | Expired / Lapsed | 1951-03-28 | 1956-03-20 | 0 | Details |
| US2736784A | Electric probe | Expired / Lapsed | 1953-06-01 | 1956-02-28 | 0 | Details |
| US2731630A | Monitoring system for inductive signaling devices | Expired / Lapsed | 1953-03-27 | 1956-01-17 | 0 | Details |
| US2731217A | Positioning system monitor | Expired / Lapsed | 1950-04-11 | 1956-01-17 | 0 | Details |
| US2729772A | Servo system controlled by electrical signals | Expired / Lapsed | 1951-02-20 | 1956-01-03 | 0 | Details |
| FR1105902A | Improvements to friction substances | Expired / Lapsed | 1954-05-17 | 1955-12-09 | 0 | Details |
| US2724818A | Magnetostriction vibrator construction for directional tran… | Expired / Lapsed | 1951-08-21 | 1955-11-22 | 0 | Details |
| US2721996A | Triggering circuit | Expired / Lapsed | 1952-07-23 | 1955-10-25 | 0 | Details |
| US2720561A | Cam-actuated electric switch | Expired / Lapsed | 1953-03-09 | 1955-10-11 | 0 | Details |
| US2718591A | Function generator | Expired / Lapsed | 1951-09-18 | 1955-09-20 | 0 | Details |
| US2718061A | Automatic position plotter | Expired / Lapsed | 1946-10-10 | 1955-09-20 | 0 | Details |
| US2717370A | Transmitting system and method | Expired / Lapsed | 1950-09-08 | 1955-09-06 | 0 | Details |
| US2716744A | Socket contact for electrical connector | Expired / Lapsed | 1952-04-01 | 1955-08-30 | 0 | Details |
| US2715418A | Diaphragm valve for a carburetor | Expired / Lapsed | 1949-03-10 | 1955-08-16 | 0 | Details |
| US2714658A | Decoder | Expired / Lapsed | 1950-11-02 | 1955-08-02 | 0 | Details |
| US2713639A | Shock-excited oscillatory circuit | Expired / Lapsed | 1950-02-21 | 1955-07-19 | 0 | Details |
| FR1095026A | Improvements to arithmetic differential analyzers | Expired / Lapsed | 1953-12-16 | 1955-05-26 | 0 | Details |
| FR1094570A | Improvements to arithmetic differential analyzers | Expired / Lapsed | 1953-12-05 | 1955-05-23 | 0 | Details |
| US2707562A | Filter | Expired / Lapsed | 1952-04-17 | 1955-05-03 | 0 | Details |
| US2705047A | Fuel control system for gas turbine engines | Expired / Lapsed | 1949-08-18 | 1955-03-29 | 0 | Details |
| US2703862A | Generator frequency stabilizing system | Expired / Lapsed | 1951-06-15 | 1955-03-08 | 0 | Details |
| US2700935A | Rocket fuel pump and the like | Expired / Lapsed | 1948-04-27 | 1955-02-01 | 0 | Details |
| US2699343A | Quick disconnect mounting | Expired / Lapsed | 1950-12-20 | 1955-01-11 | 0 | Details |
| US2699141A | Illuminated knob | Expired / Lapsed | 1950-11-24 | 1955-01-11 | 0 | Details |
| US2696788A | Variable volume constant pressure pump | Expired / Lapsed | 1951-02-13 | 1954-12-14 | 0 | Details |
| US2695207A | Hermetically sealed package | Expired / Lapsed | 1951-08-28 | 1954-11-23 | 0 | Details |
| US2695384A | Inductive device of the saturable core type having flux reg… | Expired / Lapsed | 1949-11-01 | 1954-11-23 | 0 | Details |
| US2694900A | Aircraft engine power control to maintain selected combusti… | Expired / Lapsed | 1948-07-27 | 1954-11-23 | 0 | Details |
| FR1075023A | Depth regulator for tillage implements carried or pulled by… | Expired / Lapsed | 1953-02-25 | 1954-10-12 | 0 | Details |
| US2689606A | Fuel feeding system for gas turbine engines | Expired / Lapsed | 1946-12-13 | 1954-09-21 | 0 | Details |
| US2686262A | Pulse generator | Expired / Lapsed | 1951-06-11 | 1954-08-10 | 0 | Details |
| US2685871A | Load sensing engine governor | Expired / Lapsed | 1951-01-23 | 1954-08-10 | 0 | Details |
| US2685035A | Mass spectrometer | Expired / Lapsed | 1951-10-02 | 1954-07-27 | 0 | Details |
| US2684444A | Pocket antenna | Expired / Lapsed | 1950-08-15 | 1954-07-20 | 0 | Details |
| US2683418A | Pump | Expired / Lapsed | 1948-09-10 | 1954-07-13 | 0 | Details |
| US2682000A | System for measuring radioactivity | Expired / Lapsed | 1951-05-31 | 1954-06-22 | 0 | Details |
| US2680240A | Telemetering system | Expired / Lapsed | 1951-08-16 | 1954-06-01 | 0 | Details |
| US2679366A | Integrating a rate signal in an automatic pilot system | Expired / Lapsed | 1950-10-25 | 1954-05-25 | 0 | Details |
| US2678178A | Altitude control device for aircraft | Expired / Lapsed | 1950-06-23 | 1954-05-11 | 0 | Details |
| US2677946A | Coupling | Expired / Lapsed | 1950-05-03 | 1954-05-11 | 0 | Details |
| US2677272A | Stress indicating apparatus | Expired / Lapsed | 1951-03-19 | 1954-05-04 | 0 | Details |
| US2675829A | Quick-disconnect coupling with selectively operable valve | Expired / Lapsed | 1951-06-22 | 1954-04-20 | 0 | Details |
| US2676284A | Fault protective system | Expired / Lapsed | 1950-09-13 | 1954-04-20 | 0 | Details |
| US2674711A | Aircraft control system monitor | Expired / Lapsed | 1950-05-16 | 1954-04-06 | 0 | Details |
| US2673522A | Diaphragm pump | Expired / Lapsed | 1951-04-10 | 1954-03-30 | 0 | Details |
| US2673314A | Positioning system monitor | Expired / Lapsed | 1950-05-03 | 1954-03-23 | 0 | Details |
| FR1055460A | Digital infinitesimal calculus method and device | Expired / Lapsed | 1952-05-05 | 1954-02-18 | 0 | Details |
| US2669096A | Temperature compensated force and motion transmitting system | Expired / Lapsed | 1950-03-01 | 1954-02-16 | 0 | Details |
| US2667742A | Starting system for gas turbine engines | Expired / Lapsed | 1947-02-24 | 1954-02-02 | 0 | Details |
| US2666153A | Reciprocatory electric motor | Expired / Lapsed | 1950-12-22 | 1954-01-12 | 0 | Details |
| US2665086A | Aircraft control system monitor | Expired / Lapsed | 1949-11-03 | 1954-01-05 | 0 | Details |
| US2664489A | Electrical heating system | Expired / Lapsed | 1950-10-09 | 1953-12-29 | 0 | Details |
| US2662377A | Power boost control device | Expired / Lapsed | 1951-11-29 | 1953-12-15 | 0 | Details |
| US2662219A | Electrical connector having a grommet and means to axially … | Expired / Lapsed | 1950-03-07 | 1953-12-08 | 0 | Details |
| US2662207A | Automatic steering system with displacement limiting means | Expired / Lapsed | 1949-01-07 | 1953-12-08 | 0 | Details |
| US2658566A | Fuel feed and power control device for gas turbines | Expired / Lapsed | 1945-08-20 | 1953-11-10 | 0 | Details |
| US2654224A | Power-operated hydraulic actuator | Expired / Lapsed | 1950-09-27 | 1953-10-06 | 0 | Details |
| US2652488A | Squelch circuit | Expired / Lapsed | 1950-12-29 | 1953-09-15 | 0 | Details |
| US2648746A | Engine-function switching mechanism | Expired / Lapsed | 1949-05-31 | 1953-08-11 | 0 | Details |
| US2648015A | System for measuring radioactivity | Expired / Lapsed | 1951-05-31 | 1953-08-04 | 0 | Details |
| US2648041A | Altitude sensor | Expired / Lapsed | 1950-11-28 | 1953-08-04 | 0 | Details |
| US2647976A | Electrical resistor | Expired / Lapsed | 1949-03-25 | 1953-08-04 | 0 | Details |
| US2646950A | Outboard transducer assembly | Expired / Lapsed | 1950-03-13 | 1953-07-28 | 0 | Details |
| US2644513A | Gas turbine fuel feed and power control device responsive t… | Expired / Lapsed | 1945-10-06 | 1953-07-07 | 0 | Details |
| US2643344A | System for measuring radioactivity | Expired / Lapsed | 1950-01-10 | 1953-06-23 | 0 | Details |
| US2642554A | Automatic steering system | Expired / Lapsed | 1947-01-23 | 1953-06-16 | 0 | Details |
| US2641188A | Reciprocating electromagnetic pump | Expired / Lapsed | 1951-08-23 | 1953-06-09 | 0 | Details |
| US2640370A | Hydraulic servo system | Expired / Lapsed | 1950-12-26 | 1953-06-02 | 0 | Details |
| US2640899A | Switch actuating mechanism | Expired / Lapsed | 1950-07-17 | 1953-06-02 | 0 | Details |
| US2639722A | Pump unloading valve | Expired / Lapsed | 1947-03-21 | 1953-05-26 | 0 | Details |
| US2639379A | Electronic switching and mixing circuit for pulsating direc… | Expired / Lapsed | 1950-10-16 | 1953-05-19 | 0 | Details |
| US2635641A | Fluid filtering and metering device | Expired / Lapsed | 1947-12-22 | 1953-04-21 | 0 | Details |
| US2633405A | Stylus structure for electrical recorders | Expired / Lapsed | 1950-12-28 | 1953-03-31 | 0 | Details |
| US2633028A | Pick-off device | Expired / Lapsed | 1949-10-31 | 1953-03-31 | 0 | Details |
| US2632872A | Control circuit | Expired / Lapsed | 1949-04-25 | 1953-03-24 | 0 | Details |
| US2632326A | True air speed indicator of the ionization type | Expired / Lapsed | 1948-08-31 | 1953-03-24 | 0 | Details |
| US2631778A | Digitizer | Expired / Lapsed | 1950-06-06 | 1953-03-17 | 0 | Details |
| US2631795A | Hydraulically controlled steering mechanism for aircraft | Expired / Lapsed | 1947-05-02 | 1953-03-17 | 0 | Details |
| US2630129A | Respiratory device | Expired / Lapsed | 1947-01-22 | 1953-03-03 | 0 | Details |
| US2625600A | Decoding information translator | Expired / Lapsed | 1951-05-03 | 1953-01-13 | 0 | Details |
| US2625632A | Control apparatus | Expired / Lapsed | 1950-08-21 | 1953-01-13 | 0 | Details |
| US2625633A | Potentiometer | Expired / Lapsed | 1949-12-31 | 1953-01-13 | 0 | Details |
| US2625348A | Automatic pilot | Expired / Lapsed | 1943-12-31 | 1953-01-13 | 0 | Details |
| US2621911A | Carburetor | Expired / Lapsed | 1947-12-30 | 1952-12-16 | 0 | Details |
| US2619933A | Adjustable torque and deflection control mechanism for indi… | Expired / Lapsed | 1950-07-05 | 1952-12-02 | 0 | Details |
| US2616442A | Respiratory device | Expired / Lapsed | 1946-06-18 | 1952-11-04 | 0 | Details |
| US2616254A | Jet engine fuel control for modifying fuel pressure drop ac… | Expired / Lapsed | 1945-01-04 | 1952-11-04 | 0 | Details |
| US2616019A | Electric heater control | Expired / Lapsed | 1949-06-17 | 1952-10-28 | 0 | Details |
| US2616018A | Temperature control system | Expired / Lapsed | 1949-06-17 | 1952-10-28 | 0 | Details |
| US2614776A | Flight controller for automatic pilot | Expired / Lapsed | 1947-02-17 | 1952-10-21 | 0 | Details |
| US2611413A | Tool for manufacturing spiral groove tubing | Expired / Lapsed | 1949-07-25 | 1952-09-23 | 0 | Details |
| US2611190A | Navigation system | Expired / Lapsed | 1949-01-05 | 1952-09-23 | 0 | Details |
| US2611191A | Telemetric or repeater system | Expired / Lapsed | 1945-05-29 | 1952-09-23 | 0 | Details |
| US2609712A | Two-speed gearing for bicycles | Expired / Lapsed | 1951-01-22 | 1952-09-09 | 0 | Details |
| US2609809A | Electric fuel pump control for internal-combustion engines | Expired / Lapsed | 1950-09-18 | 1952-09-09 | 0 | Details |
| US2609708A | Transmission | Expired / Lapsed | 1949-09-13 | 1952-09-09 | 0 | Details |
| US2609932A | Fluid purifying device | Expired / Lapsed | 1948-10-05 | 1952-09-09 | 0 | Details |
| US2607456A | Fluid transmission | Expired / Lapsed | 1945-10-29 | 1952-08-19 | 0 | Details |
| US2605873A | Clutch control mechanism | Expired / Lapsed | 1949-06-18 | 1952-08-05 | 0 | Details |
| US2605854A | Steering mechanism | Expired / Lapsed | 1948-11-18 | 1952-08-05 | 0 | Details |
| US2606066A | Automatic flow regulator | Expired / Lapsed | 1947-04-03 | 1952-08-05 | 0 | Details |
| US2597199A | Echo distance measuring apparatus | Expired / Lapsed | 1948-05-25 | 1952-05-20 | 0 | Details |
| US2596361A | Displacement indicating apparatus | Expired / Lapsed | 1951-03-19 | 1952-05-13 | 0 | Details |
| US2596446A | Electric recording apparatus | Expired / Lapsed | 1948-11-12 | 1952-05-13 | 0 | Details |
| US2593014A | Altitude control system | Expired / Lapsed | 1946-04-26 | 1952-04-15 | 0 | Details |
| US2592173A | Automatic control of mobile craft | Expired / Lapsed | 1946-10-25 | 1952-04-08 | 0 | Details |
| US2589834A | Automatic steering system | Expired / Lapsed | 1946-01-31 | 1952-03-18 | 0 | Details |
| US2589628A | Clutch control mechanism | Expired / Lapsed | 1945-03-10 | 1952-03-18 | 0 | Details |
| US2587946A | Meteorological apparatus | Expired / Lapsed | 1946-10-17 | 1952-03-04 | 0 | Details |
| US2585532A | Frequency discriminating circuit | Expired / Lapsed | 1948-01-26 | 1952-02-12 | 0 | Details |
| US2585162A | Coordinated turn controller for automatic pilot systems | Expired / Lapsed | 1947-09-18 | 1952-02-12 | 0 | Details |
| US2585128A | Aluminum optical mirror and method of making same | Expired / Lapsed | 1946-03-01 | 1952-02-12 | 2 | Details |
| US2583832A | Clamping circuits | Expired / Lapsed | 1947-02-28 | 1952-01-29 | 0 | Details |
| US2579271A | Temperature probe | Expired / Lapsed | 1948-12-03 | 1951-12-18 | 0 | Details |
| US2577049A | Shielded terminal having a composite metal ferrule for a fl… | Expired / Lapsed | 1945-06-23 | 1951-12-04 | 0 | Details |
| US2576394A | Electrical apparatus | Expired / Lapsed | 1945-06-02 | 1951-11-27 | 0 | Details |
| US2573231A | Pilot-operated relief valve | Expired / Lapsed | 1947-12-26 | 1951-10-30 | 0 | Details |
| US2569328A | Automatic position plotter | Expired / Lapsed | 1946-01-23 | 1951-09-25 | 0 | Details |
| US2567984A | Apparatus for shipboard wind measurement | Expired / Lapsed | 1949-08-10 | 1951-09-18 | 0 | Details |
| US2568007A | Transmission | Expired / Lapsed | 1945-10-29 | 1951-09-18 | 0 | Details |
| US2566631A | Clutch control mechanism | Expired / Lapsed | 1947-09-13 | 1951-09-04 | 0 | Details |
| US2566445A | Direct cranking engine starter | Expired / Lapsed | 1947-04-30 | 1951-09-04 | 0 | Details |
| US2564528A | Monitor for pumping systems | Expired / Lapsed | 1946-10-07 | 1951-08-14 | 0 | Details |
| US2563762A | Electrical connector having resilient insert | Expired / Lapsed | 1946-02-11 | 1951-08-07 | 0 | Details |
| US2563761A | Socket connector having an indented solder wall | Expired / Lapsed | 1945-09-20 | 1951-08-07 | 0 | Details |
| US2563713A | Electrical connector having resilient inserts | Expired / Lapsed | 1945-09-20 | 1951-08-07 | 0 | Details |
| US2563712A | Electrical connector having resilient inserts | Expired / Lapsed | 1945-08-18 | 1951-08-07 | 0 | Details |
| US2563760A | Electrical socket connector having fingers of tapered thick… | Expired / Lapsed | 1945-08-18 | 1951-08-07 | 0 | Details |
| US2561654A | Servo system with fine and coarse adjustment | Expired / Lapsed | 1948-11-03 | 1951-07-24 | 0 | Details |
| US2558343A | Oscillation generating apparatus | Expired / Lapsed | 1947-08-29 | 1951-06-26 | 0 | Details |
| US2557196A | Stylus structure for electrical recorders | Expired / Lapsed | 1949-01-25 | 1951-06-19 | 0 | Details |
| US2554313A | Transmission operating mechanism | Expired / Lapsed | 1943-01-13 | 1951-05-22 | 0 | Details |
| US2552480A | Electrical heating system | Expired / Lapsed | 1945-10-29 | 1951-05-08 | 0 | Details |
| US2551287A | Vehicle control mechanism | Expired / Lapsed | 1942-09-23 | 1951-05-01 | 0 | Details |
| US2549749A | Speed responsive coupling | Expired / Lapsed | 1944-06-03 | 1951-04-17 | 0 | Details |
| US2548532A | Circuit for the generation of a linearly varying current | Expired / Lapsed | 1945-09-29 | 1951-04-10 | 0 | Details |
| US2548708A | Electrically heated steam generator and power unit | Expired / Lapsed | 1945-08-02 | 1951-04-10 | 0 | Details |
| US2545343A | Electric motor control system | Expired / Lapsed | 1949-04-20 | 1951-03-13 | 0 | Details |
| US2544849A | Hydraulic brake automatic adjuster | Expired / Lapsed | 1946-01-23 | 1951-03-13 | 0 | Details |
| US2544042A | Hydraulic power brake servo mechanism | Expired / Lapsed | 1945-06-09 | 1951-03-06 | 0 | Details |
| US2543608A | Calling system | Expired / Lapsed | 1946-08-05 | 1951-02-27 | 0 | Details |
| US2534801A | Electric motor control system | Expired / Lapsed | 1946-03-11 | 1950-12-19 | 0 | Details |
| US2533755A | Speed controlled coupling | Expired / Lapsed | 1945-04-12 | 1950-12-12 | 0 | Details |
| US2532936A | Altitude corrected landing system for aircraft | Expired / Lapsed | 1947-04-18 | 1950-12-05 | 0 | Details |
| US2531780A | Fuel feeding system for engines | Expired / Lapsed | 1945-04-02 | 1950-11-28 | 0 | Details |
| US2530739A | Stylus holder | Expired / Lapsed | 1948-03-12 | 1950-11-21 | 0 | Details |
| US2526425A | Radio-telemetering with phase modulation | Expired / Lapsed | 1947-10-28 | 1950-10-17 | 0 | Details |
| US2525179A | Electric resistor control device | Expired / Lapsed | 1946-02-18 | 1950-10-10 | 0 | Details |
| US2522870A | Phonograph pickup system | Expired / Lapsed | 1946-09-30 | 1950-09-19 | 0 | Details |
| US2522228A | Transmission control mechanism | Expired / Lapsed | 1946-03-18 | 1950-09-12 | 0 | Details |
| US2521070A | Oscillation generator | Expired / Lapsed | 1946-05-31 | 1950-09-05 | 0 | Details |
| US2521058A | Frequency and phase control system | Expired / Lapsed | 1946-05-28 | 1950-09-05 | 0 | Details |
| US2521056A | Electrical connecting means | Expired / Lapsed | 1945-08-18 | 1950-09-05 | 0 | Details |
| US2520734A | Transmission operating means | Expired / Lapsed | 1943-12-31 | 1950-08-29 | 0 | Details |
| US2517712A | Electronic counter | Expired / Lapsed | 1945-01-24 | 1950-08-08 | 0 | Details |
| US2516641A | Automatic pilot control | Expired / Lapsed | 1945-07-13 | 1950-07-25 | 0 | Details |
| US2515944A | Remotely controlled accurate positioning system | Expired / Lapsed | 1949-01-17 | 1950-07-18 | 0 | Details |
| US2515968A | Pulse length measurement | Expired / Lapsed | 1947-05-07 | 1950-07-18 | 0 | Details |
| US2513738A | Line of sight stabilization | Expired / Lapsed | 1945-03-14 | 1950-07-04 | 0 | Details |
| US2512902A | Aircraft altitude control | Expired / Lapsed | 1948-01-28 | 1950-06-27 | 0 | Details |
| US2506093A | Power steering apparatus for nose wheels | Expired / Lapsed | 1947-06-05 | 1950-05-02 | 0 | Details |
| US2504848A | Resistance measuring apparatus | Expired / Lapsed | 1945-11-16 | 1950-04-18 | 0 | Details |
| US2504470A | Relief valve | Expired / Lapsed | 1945-06-18 | 1950-04-18 | 0 | Details |
| US2500655A | Constant speed and frequency drive | Expired / Lapsed | 1947-07-10 | 1950-03-14 | 0 | Details |
| US2500536A | Pulse-time demodulator | Expired / Lapsed | 1947-02-27 | 1950-03-14 | 0 | Details |
| US2500505A | Automatic gain control system | Expired / Lapsed | 1945-02-08 | 1950-03-14 | 0 | Details |
| US2500585A | Distance per unit of fuel measure indicator | Expired / Lapsed | 1943-10-12 | 1950-03-14 | 0 | Details |
| US2499993A | Inertia actuated vehicle safety device | Expired / Lapsed | 1948-04-01 | 1950-03-07 | 0 | Details |
| US2496674A | System for ground speed determination | Expired / Lapsed | 1946-02-02 | 1950-02-07 | 0 | Details |
| US2495598A | Electrically operated pump | Expired / Lapsed | 1945-12-19 | 1950-01-24 | 0 | Details |
| US2494124A | Alarm initiator for pumping systems | Expired / Lapsed | 1946-09-30 | 1950-01-10 | 0 | Details |
| US2490115A | Variable displacement rotary pump | Expired / Lapsed | 1942-10-28 | 1949-12-06 | 0 | Details |
| US2488573A | Evacuation pump and filler assembly for filling batteries | Expired / Lapsed | 1945-02-12 | 1949-11-22 | 0 | Details |
| US2488384A | Fluid pump | Expired / Lapsed | 1946-02-11 | 1949-11-15 | 0 | Details |
| US2486047A | Supercharger regulator | Expired / Lapsed | 1947-10-07 | 1949-10-25 | 0 | Details |
| US2482974A | Frequency multiplier having an output of pulse groups | Expired / Lapsed | 1947-07-03 | 1949-09-27 | 0 | Details |
| US2483042A | Securing means | Expired / Lapsed | 1946-05-07 | 1949-09-27 | 0 | Details |
| US2482973A | Frequency multiplier | Expired / Lapsed | 1946-04-30 | 1949-09-27 | 0 | Details |
| US2482440A | Radiant energy receiver | Expired / Lapsed | 1944-03-13 | 1949-09-20 | 0 | Details |
| US2481728A | Humidity responsive resistor | Expired / Lapsed | 1945-10-24 | 1949-09-13 | 0 | Details |
| US2481347A | Photoelectric counting device | Expired / Lapsed | 1946-10-28 | 1949-09-06 | 0 | Details |
| US2480558A | Accumulator | Expired / Lapsed | 1944-03-09 | 1949-08-30 | 0 | Details |
| US2480758A | Control mechanism for supercharged aircraft engines | Expired / Lapsed | 1944-01-10 | 1949-08-30 | 0 | Details |
| US2479019A | Actuator nut | Expired / Lapsed | 1947-12-03 | 1949-08-16 | 0 | Details |
| US2475894A | Pressure responsive mechanism | Expired / Lapsed | 1944-08-19 | 1949-07-12 | 0 | Details |
| US2474618A | Altitude control | Expired / Lapsed | 1946-04-08 | 1949-06-28 | 0 | Details |
| US2474122A | Pilot valve | Expired / Lapsed | 1947-12-17 | 1949-06-21 | 0 | Details |
| US2473620A | Valve | Expired / Lapsed | 1944-12-05 | 1949-06-21 | 0 | Details |
| US2472334A | Reciprocating electromagnetic motor | Expired / Lapsed | 1947-09-18 | 1949-06-07 | 0 | Details |
| US2471843A | Remote-control system | Expired / Lapsed | 1945-11-28 | 1949-05-31 | 0 | Details |
| US2470027A | Pulse-time modulator | Expired / Lapsed | 1947-02-21 | 1949-05-10 | 0 | Details |
| US2470028A | Pulse generation | Expired / Lapsed | 1946-01-18 | 1949-05-10 | 0 | Details |
| US2468343A | Reciprocatory electromagnetic motor | Expired / Lapsed | 1947-08-26 | 1949-04-26 | 0 | Details |
| US2467509A | Hydraulic system | Expired / Lapsed | 1946-01-09 | 1949-04-19 | 0 | Details |
| US2467929A | Recording and controlling apparatus | Expired / Lapsed | 1945-10-04 | 1949-04-19 | 0 | Details |
| US2466485A | Valve | Expired / Lapsed | 1944-03-11 | 1949-04-05 | 0 | Details |
| US2463805A | Control device | Expired / Lapsed | 1944-11-10 | 1949-03-08 | 0 | Details |
| US2462994A | Power steering mechanism | Expired / Lapsed | 1946-03-14 | 1949-03-01 | 0 | Details |
| US2462452A | Variable gain amplifier | Expired / Lapsed | 1945-03-12 | 1949-02-22 | 0 | Details |
| US2460774A | Valve | Expired / Lapsed | 1943-09-18 | 1949-02-01 | 0 | Details |
| US2457750A | Power steering mechanism | Expired / Lapsed | 1945-09-04 | 1948-12-28 | 0 | Details |
| US2456211A | Fluid pressure servomotor | Expired / Lapsed | 1943-08-10 | 1948-12-14 | 0 | Details |
| US2454060A | Relay | Expired / Lapsed | 1944-09-16 | 1948-11-16 | 0 | Details |
| US2452633A | Means for causing prerotation of aircraft wheels | Expired / Lapsed | 1945-02-17 | 1948-11-02 | 0 | Details |
| US2452647A | Control valve | Expired / Lapsed | 1944-11-25 | 1948-11-02 | 0 | Details |
| US2450161A | Clutch control mechanism | Expired / Lapsed | 1945-05-28 | 1948-09-28 | 0 | Details |
| US2450126A | Fluid power steering mechanism | Expired / Lapsed | 1945-04-30 | 1948-09-28 | 0 | Details |
| US2450160A | Pressure fluid operated pressure intensifier | Expired / Lapsed | 1944-04-19 | 1948-09-28 | 0 | Details |
| US2450084A | Electric motor servo control system | Expired / Lapsed | 1943-12-31 | 1948-09-28 | 0 | Details |
| US2447815A | Fluid pressure controlled power steering mechanism | Expired / Lapsed | 1944-06-22 | 1948-08-24 | 0 | Details |
| US2447820A | Regulating valve | Expired / Lapsed | 1943-09-03 | 1948-08-24 | 0 | Details |
| US2447263A | Charge forming device | Expired / Lapsed | 1948-01-21 | 1948-08-17 | 0 | Details |
| US2447261A | Charge forming device | Expired / Lapsed | 1940-10-24 | 1948-08-17 | 0 | Details |
| US2447267A | Fuel feeding system | Expired / Lapsed | 1940-01-19 | 1948-08-17 | 0 | Details |
| US2447265A | Fuel control device | Expired / Lapsed | 1939-11-03 | 1948-08-17 | 0 | Details |
| US2445544A | Flow-regulating valve | Expired / Lapsed | 1945-02-16 | 1948-07-20 | 0 | Details |
| US2445516A | Laundry drier | Expired / Lapsed | 1944-08-05 | 1948-07-20 | 0 | Details |
| US2444210A | Electronic timer | Expired / Lapsed | 1947-04-23 | 1948-06-29 | 0 | Details |
| US2444106A | Automatic weather station | Expired / Lapsed | 1945-07-18 | 1948-06-29 | 0 | Details |
| US2444209A | Electronic timer control for inflatable boots on aircraft | Expired / Lapsed | 1944-12-18 | 1948-06-29 | 0 | Details |
| US2444208A | Control system, apparatus, and method for the elimination o… | Expired / Lapsed | 1943-08-11 | 1948-06-29 | 0 | Details |
| US2442823A | Radiant energy receiver | Expired / Lapsed | 1944-03-13 | 1948-06-08 | 0 | Details |
| FR934814A | Improvements in fuel supply and power control devices for g… | Expired / Lapsed | 1946-10-05 | 1948-06-02 | 0 | Details |
| US2441888A | Switch | Expired / Lapsed | 1945-03-06 | 1948-05-18 | 0 | Details |
| US2439844A | Amplifier and oscillator circuit | Expired / Lapsed | 1943-10-29 | 1948-04-20 | 0 | Details |
| US2439877A | Cathode-ray phase indicator | Expired / Lapsed | 1943-10-06 | 1948-04-20 | 0 | Details |
| US2439701A | Induction system | Expired / Lapsed | 1944-09-02 | 1948-04-13 | 0 | Details |
| US2439094A | Linear follow-up system | Expired / Lapsed | 1945-08-07 | 1948-04-06 | 0 | Details |
| US2439277A | High-frequency coil | Expired / Lapsed | 1944-01-15 | 1948-04-06 | 0 | Details |
| US2438283A | Switching system | Expired / Lapsed | 1945-01-13 | 1948-03-23 | 0 | Details |
| US2436068A | Follow-up motor control system | Expired / Lapsed | 1945-10-09 | 1948-02-17 | 0 | Details |
| US2434050A | Tractor-trailer brake system | Expired / Lapsed | 1945-12-21 | 1948-01-06 | 0 | Details |
| US2434232A | Grille | Expired / Lapsed | 1945-06-29 | 1948-01-06 | 0 | Details |
| US2433288A | Weather station | Expired / Lapsed | 1944-05-04 | 1947-12-23 | 0 | Details |
| US2432721A | Steering gear control | Expired / Lapsed | 1944-03-30 | 1947-12-16 | 0 | Details |
| US2432036A | Automatic control system | Expired / Lapsed | 1944-11-10 | 1947-12-02 | 0 | Details |
| US2429426A | Piston seal | Expired / Lapsed | 1942-09-14 | 1947-10-21 | 0 | Details |
| US2429194A | Control valve | Expired / Lapsed | 1943-12-24 | 1947-10-14 | 0 | Details |
| US2426740A | Engine control | Expired / Lapsed | 1937-01-29 | 1947-09-02 | 0 | Details |
| US2425541A | Photoelectric drift indicator | Expired / Lapsed | 1944-07-03 | 1947-08-12 | 0 | Details |
| US2423006A | Brake system | Expired / Lapsed | 1944-07-10 | 1947-06-24 | 0 | Details |
| US2423057A | Automatic brake control | Expired / Lapsed | 1944-05-29 | 1947-06-24 | 0 | Details |
| US2422762A | Remote indicating flowmeter | Expired / Lapsed | 1943-10-12 | 1947-06-24 | 0 | Details |
| US2422382A | Distance measuring apparatus | Expired / Lapsed | 1943-03-29 | 1947-06-17 | 0 | Details |
| US2421077A | Projector apparatus | Expired / Lapsed | 1944-12-08 | 1947-05-27 | 0 | Details |
| US2420605A | Frequency modulated rotating radio beacon | Expired / Lapsed | 1942-07-16 | 1947-05-13 | 0 | Details |
| FR920524A | Improvements to fuel supply and power control systems for g… | Expired / Lapsed | 1946-01-19 | 1947-04-10 | 0 | Details |
| US2418531A | Ignition coil | Expired / Lapsed | 1939-12-21 | 1947-04-08 | 0 | Details |
| US2416741A | Radio distance measuring apparatus | Expired / Lapsed | 1942-10-15 | 1947-03-04 | 0 | Details |
| US2416129A | Fluid torque converter | Expired / Lapsed | 1944-10-30 | 1947-02-18 | 0 | Details |
| US2415036A | Resistance material | Expired / Lapsed | 1944-10-13 | 1947-01-28 | 0 | Details |
| US2414577A | Carburetor valve | Expired / Lapsed | 1940-09-23 | 1947-01-21 | 0 | Details |
| US2414158A | Fuel supply system with vapor separator and booster pump | Expired / Lapsed | 1939-08-18 | 1947-01-14 | 0 | Details |
| US2413114A | Gun turret | Expired / Lapsed | 1943-01-18 | 1946-12-24 | 0 | Details |
| US2412829A | Engine starting mechanism | Expired / Lapsed | 1944-06-22 | 1946-12-17 | 0 | Details |
| US2411781A | Electrical apparatus | Expired / Lapsed | 1943-10-09 | 1946-11-26 | 0 | Details |
| US2411287A | Charge forming device | Expired / Lapsed | 1941-12-29 | 1946-11-19 | 0 | Details |
| US2410751A | Pressure actuated valve | Expired / Lapsed | 1942-06-03 | 1946-11-05 | 0 | Details |
| US2410502A | Aircraft control apparatus | Expired / Lapsed | 1940-04-06 | 1946-11-05 | 0 | Details |
| US2409435A | Indicating mechanism | Expired / Lapsed | 1943-09-13 | 1946-10-15 | 0 | Details |
| US2407757A | Magnetic clutch | Expired / Lapsed | 1943-12-08 | 1946-09-17 | 0 | Details |
| US2404102A | Regulating valve | Expired / Lapsed | 1942-12-12 | 1946-07-16 | 0 | Details |
| US2403332A | Regulator | Expired / Lapsed | 1944-07-18 | 1946-07-02 | 0 | Details |
| US2402343A | Transmission operating mechanism | Expired / Lapsed | 1943-12-20 | 1946-06-18 | 0 | Details |
| US2402360A | Instrument case | Expired / Lapsed | 1942-12-05 | 1946-06-18 | 0 | Details |
| US2399843A | Emergency valve | Expired / Lapsed | 1942-11-09 | 1946-05-07 | 0 | Details |
| US2399384A | Ventilating apparatus | Expired / Lapsed | 1942-03-19 | 1946-04-30 | 0 | Details |
| US2397031A | Continuous strip camera | Expired / Lapsed | 1943-06-12 | 1946-03-19 | 0 | Details |
| US2397009A | Optical apparatus | Expired / Lapsed | 1941-10-18 | 1946-03-19 | 0 | Details |
| US2396116A | Cabin pressure control | Expired / Lapsed | 1942-01-09 | 1946-03-05 | 0 | Details |
| US2394787A | Directional antenna system | Expired / Lapsed | 1941-12-12 | 1946-02-12 | 0 | Details |
| US2393571A | Regulator or unloading valve for fluid pressure systems | Expired / Lapsed | 1942-12-16 | 1946-01-22 | 0 | Details |
| US2392320A | Remote control actuator | Expired / Lapsed | 1944-10-04 | 1946-01-08 | 0 | Details |
| US2391525A | Coupling means | Expired / Lapsed | 1942-06-15 | 1945-12-25 | 0 | Details |
| US2391129A | Brake mechanism | Expired / Lapsed | 1942-08-05 | 1945-12-18 | 0 | Details |
| US2390487A | Flow regulating system | Expired / Lapsed | 1941-11-29 | 1945-12-04 | 0 | Details |
| US2389814A | Filter | Expired / Lapsed | 1943-09-10 | 1945-11-27 | 0 | Details |
| US2386844A | Keying system | Expired / Lapsed | 1942-08-10 | 1945-10-16 | 0 | Details |
| US2386668A | Piston | Expired / Lapsed | 1942-07-10 | 1945-10-09 | 0 | Details |
| US2381346A | Regulator | Expired / Lapsed | 1942-09-18 | 1945-08-07 | 0 | Details |
| US2380575A | Hydraulic compensation system | Expired / Lapsed | 1942-06-30 | 1945-07-31 | 0 | Details |
| US2376685A | Brake actuating means | Expired / Lapsed | 1941-08-16 | 1945-05-22 | 0 | Details |
| US2376699A | Transmission | Expired / Lapsed | 1941-05-13 | 1945-05-22 | 0 | Details |
| US2373259A | Transmission operating mechanism | Expired / Lapsed | 1941-12-31 | 1945-04-10 | 0 | Details |
| US2372306A | Fuel feeding device | Expired / Lapsed | 1942-06-06 | 1945-03-27 | 0 | Details |
| US2368659A | Remote control system | Expired / Lapsed | 1942-12-28 | 1945-02-06 | 0 | Details |
| US2365879A | Transmission | Expired / Lapsed | 1941-09-08 | 1944-12-26 | 0 | Details |
| US2365520A | Fastening device | Expired / Lapsed | 1941-11-29 | 1944-12-19 | 0 | Details |
| US2365525A | Self-cleaning filter element | Expired / Lapsed | 1941-07-09 | 1944-12-19 | 0 | Details |
| US2363977A | Motor vehicle | Expired / Lapsed | 1943-06-14 | 1944-11-28 | 0 | Details |
| US2362346A | Carburetor | Expired / Lapsed | 1932-02-23 | 1944-11-07 | 0 | Details |
| US2361790A | Rate of turn integrator | Expired / Lapsed | 1941-06-21 | 1944-10-31 | 0 | Details |
| US2354596A | Turbotransmission | Expired / Lapsed | 1940-11-25 | 1944-07-25 | 0 | Details |
| US2352550A | Power plant | Expired / Lapsed | 1943-01-22 | 1944-06-27 | 0 | Details |
| US2351952A | Brake | Expired / Lapsed | 1939-12-26 | 1944-06-20 | 0 | Details |
| US2349322A | Accumulator | Expired / Lapsed | 1942-10-02 | 1944-05-23 | 0 | Details |
| US2349244A | Actuating cylinder | Expired / Lapsed | 1942-02-26 | 1944-05-23 | 0 | Details |
| US2349345A | Piston | Expired / Lapsed | 1942-02-11 | 1944-05-23 | 0 | Details |
| US2344689A | Variable capacitor | Expired / Lapsed | 1942-03-12 | 1944-03-21 | 0 | Details |
| US2342637A | Means for reproducing motion | Expired / Lapsed | 1941-09-10 | 1944-02-29 | 0 | Details |
| US2339612A | Synchroscope | Expired / Lapsed | 1942-05-23 | 1944-01-18 | 0 | Details |
| US2339599A | Engine starter gearing | Expired / Lapsed | 1942-04-20 | 1944-01-18 | 0 | Details |
| US2332126A | Electrical apparatus | Expired / Lapsed | 1941-07-30 | 1943-10-19 | 0 | Details |
| US2332301A | Brake | Expired / Lapsed | 1940-02-21 | 1943-10-19 | 0 | Details |
| US2331128A | Power indicator | Expired / Lapsed | 1942-01-17 | 1943-10-05 | 0 | Details |
| US2328054A | Recorder | Expired / Lapsed | 1940-12-14 | 1943-08-31 | 0 | Details |
| US2323675A | Method and means for determining and regulating the mass of… | Expired / Lapsed | 1942-01-07 | 1943-07-06 | 0 | Details |
| US2322195A | Throttle control for internal combustion engines | Expired / Lapsed | 1941-04-10 | 1943-06-15 | 0 | Details |
| US2322131A | Filter | Expired / Lapsed | 1939-06-30 | 1943-06-15 | 0 | Details |
| US2320763A | Pilot valve | Expired / Lapsed | 1941-11-29 | 1943-06-01 | 0 | Details |
| US2317344A | Engine starter | Expired / Lapsed | 1942-03-04 | 1943-04-27 | 0 | Details |
| US2317028A | Accelerometer | Expired / Lapsed | 1941-08-06 | 1943-04-20 | 0 | Details |
| US2316416A | Pressure and flow regulator | Expired / Lapsed | 1940-12-31 | 1943-04-13 | 0 | Details |
| US2313682A | Compass system | Expired / Lapsed | 1940-11-05 | 1943-03-09 | 0 | Details |
| US2313430A | Brake control mechanism | Expired / Lapsed | 1940-04-03 | 1943-03-09 | 0 | Details |
| US2312757A | Radio shielded ignition apparatus | Expired / Lapsed | 1940-01-22 | 1943-03-02 | 0 | Details |
| US2308583A | Valve | Expired / Lapsed | 1941-07-22 | 1943-01-19 | 0 | Details |
| US2308645A | Indicator | Expired / Lapsed | 1940-12-14 | 1943-01-19 | 0 | Details |
| US2308566A | Magnetic repeater or compass | Expired / Lapsed | 1940-06-13 | 1943-01-19 | 0 | Details |
| US2309054A | Circuit breaker for storage battery system or the like | Expired / Lapsed | 1939-11-02 | 1943-01-19 | 0 | Details |
| US2303317A | Engine control mechanism | Expired / Lapsed | 1941-01-17 | 1942-12-01 | 0 | Details |
| US2302605A | Engine starter gearing | Expired / Lapsed | 1941-05-09 | 1942-11-17 | 0 | Details |
| US2302232A | Windshield wiping mechanism | Expired / Lapsed | 1941-04-18 | 1942-11-17 | 0 | Details |
| US2301879A | Temperature compensated pressure responsive indicating inst… | Expired / Lapsed | 1941-04-21 | 1942-11-10 | 0 | Details |
| US2301440A | Engine starting mechanism | Expired / Lapsed | 1938-11-25 | 1942-11-10 | 0 | Details |
| US2299193A | Coupling | Expired / Lapsed | 1941-01-29 | 1942-10-20 | 0 | Details |
| US2299109A | Oxygen regulating device | Expired / Lapsed | 1937-09-18 | 1942-10-20 | 0 | Details |
| US2298457A | Variable stroke motor | Expired / Lapsed | 1941-04-18 | 1942-10-13 | 0 | Details |
| US2296928A | Projecting apparatus | Expired / Lapsed | 1940-02-26 | 1942-09-29 | 0 | Details |
| US2296282A | Clutch control mechanism | Expired / Lapsed | 1941-04-02 | 1942-09-22 | 0 | Details |
| US2296289A | Clutch and transmission operating mechanism | Expired / Lapsed | 1939-09-15 | 1942-09-22 | 0 | Details |
| US2294331A | Servomotor | Expired / Lapsed | 1940-07-26 | 1942-08-25 | 0 | Details |
| US2294326A | Fuel supply system | Expired / Lapsed | 1940-07-20 | 1942-08-25 | 0 | Details |
| US2287272A | Clutch and transmission operating mechanism | Expired / Lapsed | 1939-06-22 | 1942-06-23 | 0 | Details |
| US2286621A | Pressure measuring apparatus | Expired / Lapsed | 1938-12-23 | 1942-06-16 | 0 | Details |
| US2285397A | Electrical apparatus | Expired / Lapsed | 1941-03-10 | 1942-06-09 | 0 | Details |
| US2285310A | Brake | Expired / Lapsed | 1940-01-11 | 1942-06-02 | 0 | Details |
| US2285257A | Brake | Expired / Lapsed | 1932-06-29 | 1942-06-02 | 0 | Details |
| US2284358A | Engine starting mechanism | Expired / Lapsed | 1941-02-07 | 1942-05-26 | 0 | Details |
| US2279276A | Power brake | Expired / Lapsed | 1940-04-15 | 1942-04-07 | 0 | Details |
| US2275762A | Electrical connecting means | Expired / Lapsed | 1939-04-20 | 1942-03-10 | 0 | Details |
| US2275719A | Rate of climb indicator | Expired / Lapsed | 1936-09-17 | 1942-03-10 | 0 | Details |
| US2272554A | Machine bearing | Expired / Lapsed | 1940-04-17 | 1942-02-10 | 0 | Details |
| US2266921A | Flow control valve | Expired / Lapsed | 1940-05-07 | 1941-12-23 | 0 | Details |
| US2266283A | Coupling | Expired / Lapsed | 1939-12-21 | 1941-12-16 | 0 | Details |
| US2262331A | Fluid pressure system | Expired / Lapsed | 1940-12-05 | 1941-11-11 | 0 | Details |
| US2261309A | Navigational instrument | Expired / Lapsed | 1940-06-29 | 1941-11-04 | 0 | Details |
| US2260766A | Vaporproof manifold pressure gauge | Expired / Lapsed | 1939-09-06 | 1941-10-28 | 0 | Details |
| US2259910A | Sealing and illuminating means for indicating instruments | Expired / Lapsed | 1938-09-13 | 1941-10-21 | 0 | Details |
| US2258826A | Instrument for use in flying aircraft | Expired / Lapsed | 1936-11-18 | 1941-10-14 | 0 | Details |
| US2256804A | Pressure measuring means | Expired / Lapsed | 1937-10-21 | 1941-09-23 | 0 | Details |
| US2254155A | Pitot-static tube | Expired / Lapsed | 1938-12-13 | 1941-08-26 | 0 | Details |
| US2252136A | Clutch operating mechanism | Expired / Lapsed | 1932-07-14 | 1941-08-12 | 0 | Details |
| US2243364A | Liquid pressure remote control system | Expired / Lapsed | 1939-10-19 | 1941-05-27 | 0 | Details |
| US2240680A | Earth inductor compass | Expired / Lapsed | 1938-12-29 | 1941-05-06 | 0 | Details |
| US2238124A | Brake | Expired / Lapsed | 1938-12-17 | 1941-04-15 | 0 | Details |
| US2233595A | Two-stage starter control | Expired / Lapsed | 1939-09-08 | 1941-03-04 | 0 | Details |
| US2232589A | Telemetric device | Expired / Lapsed | 1936-04-29 | 1941-02-18 | 0 | Details |
| US2231124A | Electrical apparatus | Expired / Lapsed | 1939-11-17 | 1941-02-11 | 0 | Details |
| US2227273A | Transmission control | Expired / Lapsed | 1938-09-06 | 1940-12-31 | 0 | Details |
| US2222848A | Brake | Expired / Lapsed | 1937-11-22 | 1940-11-26 | 0 | Details |
| US2221152A | Illuminating means for navigating instruments | Expired / Lapsed | 1938-06-18 | 1940-11-12 | 0 | Details |
| US2214522A | Chart drive regulator | Expired / Lapsed | 1939-06-01 | 1940-09-10 | 0 | Details |
| US2214181A | Rate of climb responsive means | Expired / Lapsed | 1938-09-02 | 1940-09-10 | 0 | Details |
| US2212955A | Pressure differential operated motor | Expired / Lapsed | 1938-09-21 | 1940-08-27 | 0 | Details |
| US2208728A | Altimeter | Expired / Lapsed | 1937-10-14 | 1940-07-23 | 0 | Details |
| US2207936A | Fluid pressure generation | Expired / Lapsed | 1939-08-17 | 1940-07-16 | 0 | Details |
| US2205164A | Temperature controlling means | Expired / Lapsed | 1936-12-09 | 1940-06-18 | 0 | Details |
| US2204492A | Engine control mechanism | Expired / Lapsed | 1939-02-28 | 1940-06-11 | 0 | Details |
| US2197726A | Starter control for internal combustion engines | Expired / Lapsed | 1938-12-24 | 1940-04-16 | 0 | Details |
| US2197715A | Starter control for internal combustion engines | Expired / Lapsed | 1938-12-23 | 1940-04-16 | 0 | Details |
| US2197155A | Screw mechanism | Expired / Lapsed | 1938-09-10 | 1940-04-16 | 0 | Details |
| US2195343A | Connecting device | Expired / Lapsed | 1938-05-16 | 1940-03-26 | 0 | Details |
| US2194624A | Diaphragm pressure gauge having temperature compensating me… | Expired / Lapsed | 1937-05-21 | 1940-03-26 | 0 | Details |
| US2189956A | Coaster brake and method of making same | Expired / Lapsed | 1937-05-15 | 1940-02-13 | 0 | Details |
| US2185277A | Hydraulic remote control | Expired / Lapsed | 1937-01-04 | 1940-01-02 | 0 | Details |
| US2180527A | Transmission | Expired / Lapsed | 1937-08-28 | 1939-11-21 | 0 | Details |
| US2175219A | Automotive control | Expired / Lapsed | 1932-02-24 | 1939-10-10 | 0 | Details |
| US2173116A | Clutch control | Expired / Lapsed | 1934-04-21 | 1939-09-19 | 0 | Details |
| US2166603A | Temperature-compensated indicating instrument | Expired / Lapsed | 1937-05-21 | 1939-07-18 | 0 | Details |
| US2166420A | Ignition manifold cable | Expired / Lapsed | 1928-12-15 | 1939-07-18 | 0 | Details |
| US2160326A | Apparatus for controlling the amount of a gas in a closed r… | Expired / Lapsed | 1934-12-19 | 1939-05-30 | 0 | Details |
| US2150489A | Totalizing and recording apparatus | Expired / Lapsed | 1936-10-02 | 1939-03-14 | 0 | Details |
| US2149764A | Magnetic filter | Expired / Lapsed | 1937-06-10 | 1939-03-07 | 0 | Details |
| US2148188A | Recorder | Expired / Lapsed | 1936-10-20 | 1939-02-21 | 0 | Details |
| US2142338A | Rate of climb indicator | Expired / Lapsed | 1937-03-06 | 1939-01-03 | 0 | Details |
| US2140972A | Means for illuminating dials of instruments | Expired / Lapsed | 1935-07-01 | 1938-12-20 | 0 | Details |
| US2140733A | Brake | Expired / Lapsed | 1935-05-25 | 1938-12-20 | 0 | Details |
| US2137249A | Vehicle transmission | Expired / Lapsed | 1935-08-14 | 1938-11-22 | 0 | Details |
| US2134946A | Radio shielding means | Expired / Lapsed | 1935-11-02 | 1938-11-01 | 0 | Details |
| US2132286A | Change responsive conrolling means | Expired / Lapsed | 1932-06-14 | 1938-10-04 | 0 | Details |
| US2123381A | Method of making expansible diaphragms | Expired / Lapsed | 1935-07-12 | 1938-07-12 | 0 | Details |
| US2121157A | Preselector device for controlling sliding pinion gear boxes | Expired / Lapsed | 1935-03-07 | 1938-06-21 | 0 | Details |
| US2118123A | Clutch control mechanism | Expired / Lapsed | 1933-10-20 | 1938-05-24 | 0 | Details |
| US2116947A | Annunciator system | Expired / Lapsed | 1932-07-30 | 1938-05-10 | 0 | Details |
| US2106083A | Means for controlling conditions or operations | Expired / Lapsed | 1933-09-08 | 1938-01-18 | 0 | Details |
| US2099466A | Altimeter | Expired / Lapsed | 1932-06-09 | 1937-11-16 | 0 | Details |
| US2095748A | Oleo gear | Expired / Lapsed | 1934-04-26 | 1937-10-12 | 0 | Details |
| US2095753A | Brake | Expired / Lapsed | 1931-12-18 | 1937-10-12 | 0 | Details |
| US2086576A | Clutch control mechanism | Expired / Lapsed | 1931-11-27 | 1937-07-13 | 0 | Details |
| US2082723A | Liquid level indicator and valve therefor | Expired / Lapsed | 1932-12-14 | 1937-06-01 | 0 | Details |
| US2078209A | Brake | Expired / Lapsed | 1932-05-06 | 1937-04-20 | 0 | Details |
| US2074372A | Testing apparatus | Expired / Lapsed | 1934-07-09 | 1937-03-23 | 0 | Details |
| US2070842A | Horsepower meter | Expired / Lapsed | 1934-02-20 | 1937-02-16 | 0 | Details |
| US2070751A | Expansible diaphragm and method of making same | Expired / Lapsed | 1932-01-22 | 1937-02-16 | 0 | Details |
| US2068956A | Brake | Expired / Lapsed | 1932-03-18 | 1937-01-26 | 0 | Details |
| US2066077A | Brake | Expired / Lapsed | 1933-02-20 | 1936-12-29 | 0 | Details |
| US2065167A | Choke valve | Expired / Lapsed | 1932-09-23 | 1936-12-22 | 0 | Details |
| US2057707A | Brake | Expired / Lapsed | 1932-05-23 | 1936-10-20 | 0 | Details |
| US2042770A | Carburetor | Expired / Lapsed | 1932-05-07 | 1936-06-02 | 0 | Details |
| US2038059A | Instrument for transmitting angular movement | Expired / Lapsed | 1935-01-17 | 1936-04-21 | 0 | Details |
| US2036653A | Brake testing mechanism | Expired / Lapsed | 1928-05-23 | 1936-04-07 | 0 | Details |
| US2015731A | Brake indicating device | Expired / Lapsed | 1932-04-04 | 1935-10-01 | 0 | Details |
| US2001971A | Brake | Expired / Lapsed | 1932-04-27 | 1935-05-21 | 0 | Details |
| US1998340A | Hygrostat | Expired / Lapsed | 1932-09-03 | 1935-04-16 | 0 | Details |
| US1992338A | Propeller blade and method of making the same | Expired / Lapsed | 1931-06-05 | 1935-02-26 | 0 | Details |
| US1965147A | Capacity altimeter | Expired / Lapsed | 1923-02-13 | 1934-07-03 | 0 | Details |
| US1947347A | Method of making tubular turbine blades | Expired / Lapsed | 1930-01-17 | 1934-02-13 | 0 | Details |
| US1939357A | Hollow blade for turbines | Expired / Lapsed | 1930-01-17 | 1933-12-12 | 0 | Details |
| US1933379A | Charge forming device | Expired / Lapsed | 1930-07-17 | 1933-10-31 | 0 | Details |
| US1919129A | Temperature control means | Expired / Lapsed | 1932-01-27 | 1933-07-18 | 0 | Details |
| US1899631A | Airplane propeller | Expired / Lapsed | 1929-05-28 | 1933-02-28 | 0 | Details |
| US1891702A | Electrical apparatus | Expired / Lapsed | 1931-10-30 | 1932-12-20 | 0 | Details |
| US1868945A | Radio direction finder | Expired / Lapsed | 1930-11-25 | 1932-07-26 | 0 | Details |
| US1843622A | Capacitor | Expired / Lapsed | 1930-05-22 | 1932-02-02 | 0 | Details |
| US1827246A | Gas turbine | Expired / Lapsed | 1930-05-16 | 1931-10-13 | 0 | Details |