General Dynamics Corp
General DyActive Patents
0
Total Holdings
248
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| FR2373891A1 | ELECTRONIC ANTENNA FOR SENDING OR RECEIVING A SIGNAL OF A S… | Expired / Lapsed | 1977-12-07 | — | 0 | Details |
| GB958415A | Method and apparatus for automatically steering a missile | Expired / Lapsed | 1961-08-02 | — | 0 | Details |
| US4022585A | Method for sealing composites against moisture and articles… | Expired / Lapsed | 1975-04-21 | 1977-05-10 | 20 | Details |
| US3971875A | Apparatus and method for vacuum hot press joining, compacti… | Expired / Lapsed | 1974-01-04 | 1976-07-27 | 20 | Details |
| US3882403A | Digital frequency synthesizer | Expired / Lapsed | 1974-03-14 | 1975-05-06 | 23 | Details |
| US3855692A | Method of manufacturing circuit board connectors | Expired / Lapsed | 1973-06-28 | 1974-12-24 | 42 | Details |
| US3854011A | Frame synchronization system for digital multiplexing syste… | Expired / Lapsed | 1973-09-24 | 1974-12-10 | 11 | Details |
| US3835384A | Tuning system | Expired / Lapsed | 1972-12-20 | 1974-09-10 | 35 | Details |
| US3816273A | Method of chemically forming wire | Expired / Lapsed | 1972-12-22 | 1974-06-11 | 17 | Details |
| US3761937A | Radio frequency transmitting apparatus having slotted metal… | Expired / Lapsed | 1972-05-11 | 1973-09-25 | 13 | Details |
| US3750127A | Method and means for sensing strain with a piezoelectric st… | Expired / Lapsed | 1971-10-28 | 1973-07-31 | 16 | Details |
| US3727616A | Electronic system for the stimulation of biological systems | Expired / Lapsed | 1971-06-15 | 1973-04-17 | 19 | Details |
| US3723868A | System for testing electronic apparatus | Expired / Lapsed | 1972-01-21 | 1973-03-27 | 14 | Details |
| FR2126011A5 | FR2126011A5 - - Google Patents | Expired / Lapsed | 1972-02-18 | 1972-09-29 | 0 | Details |
| US3606218A | Sound and vibration isolation support | Expired / Lapsed | 1969-03-21 | 1971-09-20 | 0 | Details |
| US3588836A | Magnetic recording | Expired / Lapsed | 1967-11-24 | 1971-06-28 | 0 | Details |
| US3584185A | Arc welding system and process | Expired / Lapsed | 1966-11-22 | 1971-06-08 | 8 | Details |
| US3575557A | Time division multiplex system | Expired / Lapsed | 1968-07-25 | 1971-04-20 | 17 | Details |
| US3527429A | Body motion decoupler | Expired / Lapsed | 1968-03-15 | 1970-09-08 | 0 | Details |
| US3526748A | Optical monitoring of welding systems | Expired / Lapsed | 1968-08-02 | 1970-09-01 | 0 | Details |
| US3523735A | Interferometer system for distance measurement | Expired / Lapsed | 1966-10-07 | 1970-08-11 | 0 | Details |
| US3504979A | Optical communication system | Expired / Lapsed | 1965-10-21 | 1970-04-07 | 0 | Details |
| US3487413A | Wide angle electronic scan luneberg antenna | Expired / Lapsed | 1966-12-30 | 1969-12-30 | 0 | Details |
| US3485949A | Differential phase shift keying receiver with information m… | Expired / Lapsed | 1966-05-02 | 1969-12-23 | 0 | Details |
| US3481297A | Multi-mode variable geometry surface effect ship | Expired / Lapsed | 1967-11-13 | 1969-12-02 | 0 | Details |
| US3480775A | Radiation sensitive omnidirectional motion detector system | Expired / Lapsed | 1964-08-17 | 1969-11-25 | 0 | Details |
| US3476069A | Multiple hull vehicle with air cushion support | Expired / Lapsed | 1967-01-24 | 1969-11-04 | 0 | Details |
| US3474429A | Method of writing and reading data pulses from a tape drive… | Expired / Lapsed | 1965-07-30 | 1969-10-21 | 0 | Details |
| US3463015A | Decompression monitor | Expired / Lapsed | 1966-12-12 | 1969-08-26 | 0 | Details |
| US3456244A | Data terminal with priority allocation for input-output dev… | Expired / Lapsed | 1967-03-01 | 1969-07-15 | 0 | Details |
| US3451224A | Stowable underwater manipulator | Expired / Lapsed | 1967-06-20 | 1969-06-24 | 0 | Details |
| US3445593A | Receiver for information represented by differential phase … | Expired / Lapsed | 1966-05-02 | 1969-05-20 | 0 | Details |
| US3443122A | Gating circuit utilizing junction type field effect transis… | Expired / Lapsed | 1965-11-03 | 1969-05-06 | 0 | Details |
| US3433163A | Pump | Expired / Lapsed | 1966-11-07 | 1969-03-18 | 0 | Details |
| US3429038A | Method of manufacturing electrical intraconnectors | Expired / Lapsed | 1966-08-01 | 1969-02-25 | 0 | Details |
| US3429037A | Method of making tubular solder connectors | Expired / Lapsed | 1966-08-01 | 1969-02-25 | 0 | Details |
| US3422418A | Non-linear quickened monitor and controller | Expired / Lapsed | 1964-09-17 | 1969-01-14 | 0 | Details |
| US3409836A | Frequency synthesizer for communication systems | Expired / Lapsed | 1964-08-17 | 1968-11-05 | 0 | Details |
| US3409831A | Communications system utilizing correlation detection techn… | Expired / Lapsed | 1964-03-09 | 1968-11-05 | 0 | Details |
| US3390655A | Patrol craft | Expired / Lapsed | 1967-01-17 | 1968-07-02 | 0 | Details |
| US3384113A | Relief valve | Expired / Lapsed | 1965-11-03 | 1968-05-21 | 0 | Details |
| US3382564A | Soldering apparatus and method for microelectronic circuits | Expired / Lapsed | 1965-09-27 | 1968-05-14 | 0 | Details |
| US3372339A | Communication system including frequency synthesizer system | Expired / Lapsed | 1964-08-17 | 1968-03-05 | 0 | Details |
| US3353364A | Underwater well enclosing capsule and service chamber | Expired / Lapsed | 1962-04-26 | 1967-11-21 | 4 | Details |
| US3351303A | Missile control system | Expired / Lapsed | 1960-10-12 | 1967-11-07 | 2 | Details |
| US3345732A | Method of shrink fitting and apparatus therefor | Expired / Lapsed | 1964-06-11 | 1967-10-10 | 2 | Details |
| US3343163A | Distance measuring system | Expired / Lapsed | 1963-11-12 | 1967-09-19 | 2 | Details |
| US3335063A | Multi-pyrocarbon coated nuclear fuel and poison particles a… | Expired / Lapsed | 1963-11-18 | 1967-08-08 | 6 | Details |
| US3329905A | High speed switchover circuit | Expired / Lapsed | 1964-05-21 | 1967-07-04 | 2 | Details |
| US3325363A | Carbon coated nuclear fuel and poison particles | Expired / Lapsed | 1963-04-11 | 1967-06-13 | 2 | Details |
| US3323757A | Missile autopilot | Expired / Lapsed | 1961-07-06 | 1967-06-06 | 2 | Details |
| US3316129A | Metallurgical conditioning process for precipitation-harden… | Expired / Lapsed | 1964-01-07 | 1967-04-25 | 2 | Details |
| US3314062A | Analog-to-digital converter | Expired / Lapsed | 1963-10-17 | 1967-04-11 | 2 | Details |
| US3312971A | Radar system | Expired / Lapsed | 1964-09-30 | 1967-04-04 | 1 | Details |
| US3309463A | System for locating the end of a sync period by using the s… | Expired / Lapsed | 1963-04-25 | 1967-03-14 | 2 | Details |
| US3300344A | Fuel cell having zirconia-containing electrolyte and cerami… | Expired / Lapsed | 1962-06-27 | 1967-01-24 | 1 | Details |
| US3289097A | Emergency clock pulse standby system | Expired / Lapsed | 1964-05-11 | 1966-11-29 | 1 | Details |
| US3288928A | Sampling detector | Expired / Lapsed | 1963-08-21 | 1966-11-29 | 2 | Details |
| US3277303A | Combined binocular and optical communication device | Expired / Lapsed | 1966-02-01 | 1966-10-04 | 2 | Details |
| US3275736A | Apparatus for interconnecting elements | Expired / Lapsed | 1965-04-12 | 1966-09-27 | 2 | Details |
| US3275993A | Multiple shift register buffer store | Expired / Lapsed | 1963-07-01 | 1966-09-27 | 2 | Details |
| US3275985A | Pattern recognition systems using digital logic | Expired / Lapsed | 1962-06-14 | 1966-09-27 | 2 | Details |
| US3258537A | Frequency modulation sum and difference stereo having pre-d… | Expired / Lapsed | 1961-11-16 | 1966-06-28 | 2 | Details |
| US3255092A | Control rods | Expired / Lapsed | 1961-03-24 | 1966-06-07 | 2 | Details |
| US3245653A | Trunnion mounted ball valve having lost motion and positive… | Expired / Lapsed | 1962-05-01 | 1966-04-12 | 2 | Details |
| US3244983A | Continuously tunable direct reading high frequency converter | Expired / Lapsed | 1963-03-06 | 1966-04-05 | 2 | Details |
| US3236533A | Vacuum chuck assembly | Expired / Lapsed | 1964-09-24 | 1966-02-22 | 2 | Details |
| US3231867A | Dynamic data storage circuit | Expired / Lapsed | 1962-03-02 | 1966-01-25 | 2 | Details |
| US3228030A | Shielded antenna | Expired / Lapsed | 1965-06-11 | 1966-01-04 | 2 | Details |
| US3219999A | Asynchronous translator | Expired / Lapsed | 1963-02-08 | 1965-11-23 | 2 | Details |
| US3213372A | Signal-to-noise squelch circuit | Expired / Lapsed | 1962-10-24 | 1965-10-19 | 2 | Details |
| US3213441A | Readout display system with memory | Expired / Lapsed | 1962-06-27 | 1965-10-19 | 2 | Details |
| US3213281A | Inhomogeneous magnetic field controlled laser device | Expired / Lapsed | 1962-05-24 | 1965-10-19 | 2 | Details |
| US3213196A | Data bit transmission system with means to adjust line equa… | Expired / Lapsed | 1962-01-02 | 1965-10-19 | 2 | Details |
| US3213428A | Sequential testing system | Expired / Lapsed | 1961-01-19 | 1965-10-19 | 2 | Details |
| US3209850A | Trailer having longitudinally adjustable and driven rear wh… | Expired / Lapsed | 1963-02-26 | 1965-10-05 | 2 | Details |
| US3210760A | Terrain avoidance radar | Expired / Lapsed | 1962-08-13 | 1965-10-05 | 2 | Details |
| US3205312A | Off-hook detector | Expired / Lapsed | 1960-12-23 | 1965-09-07 | 2 | Details |
| US3193732A | Tone controlled relay circuit | Expired / Lapsed | 1962-01-02 | 1965-07-06 | 4 | Details |
| US3192491A | Tuneable double-tuned circuits with variable coupling | Expired / Lapsed | 1962-12-06 | 1965-06-29 | 2 | Details |
| US3191066A | Signal sensing switch with slow release | Expired / Lapsed | 1962-10-09 | 1965-06-22 | 1 | Details |
| US3176080A | Night answering and transfer of trunk calls | Expired / Lapsed | 1959-12-11 | 1965-03-30 | 2 | Details |
| US3171040A | Fast charging circuit for pulse networks | Expired / Lapsed | 1961-01-16 | 1965-02-23 | 2 | Details |
| US3164677A | Toll charge computer | Expired / Lapsed | 1959-10-12 | 1965-01-05 | 2 | Details |
| US3159796A | Direct current controlled bridge type attenuator | Expired / Lapsed | 1961-07-10 | 1964-12-01 | 2 | Details |
| US3155889A | Minor arc selecting positional servo system | Expired / Lapsed | 1961-03-30 | 1964-11-03 | 2 | Details |
| US3154771A | Multiple selection system | Expired / Lapsed | 1959-10-19 | 1964-10-27 | 2 | Details |
| US3146314A | Means for generating warbling tone ringing signals in a tim… | Expired / Lapsed | 1961-09-25 | 1964-08-25 | 2 | Details |
| US3146367A | Electrostrictive apparatus for changing displays | Expired / Lapsed | 1960-07-05 | 1964-08-25 | 1 | Details |
| US3142834A | Analog data encoder | Expired / Lapsed | 1959-03-26 | 1964-07-28 | 2 | Details |
| US3134856A | Information transfer circuit | Expired / Lapsed | 1961-03-13 | 1964-05-26 | 1 | Details |
| US3112371A | Automatic communication system | Expired / Lapsed | 1959-05-21 | 1963-11-26 | 2 | Details |
| US3111598A | Matrix for a character display tube | Expired / Lapsed | 1960-08-31 | 1963-11-19 | 1 | Details |
| US3109065A | Decoder | Expired / Lapsed | 1960-02-19 | 1963-10-29 | 2 | Details |
| US3109068A | Data handling system | Expired / Lapsed | 1960-01-25 | 1963-10-29 | 1 | Details |
| US3102183A | Absolute temperature control | Expired / Lapsed | 1960-12-16 | 1963-08-27 | 2 | Details |
| US3102255A | Inhibitor circuit | Expired / Lapsed | 1960-07-12 | 1963-08-27 | 2 | Details |
| US3102203A | Photosensitive data providing system | Expired / Lapsed | 1960-04-15 | 1963-08-27 | 2 | Details |
| US3102258A | Binary code to analog converter | Expired / Lapsed | 1959-10-12 | 1963-08-27 | 1 | Details |
| US3091664A | Delta modulator for a time division multiplex system | Expired / Lapsed | 1961-04-24 | 1963-05-28 | 2 | Details |
| US3091755A | Stepper angle-measuring device | Expired / Lapsed | 1959-09-11 | 1963-05-28 | 2 | Details |
| US3087144A | Ramp self-testing system | Expired / Lapsed | 1961-06-26 | 1963-04-23 | 2 | Details |
| US3087022A | Automatic communication system | Expired / Lapsed | 1959-05-21 | 1963-04-23 | 2 | Details |
| US3087087A | Electron beam control apparatus for light responsive displa… | Expired / Lapsed | 1956-02-28 | 1963-04-23 | 2 | Details |
| US3084325A | R.m.s. voltage regulator | Expired / Lapsed | 1960-02-29 | 1963-04-02 | 0 | Details |
| US3077658A | Method of manufacturing molded module assemblies | Expired / Lapsed | 1960-04-11 | 1963-02-19 | 2 | Details |
| US3075743A | Turbo-machine with slotted blades | Expired / Lapsed | 1958-10-20 | 1963-01-29 | 2 | Details |
| US3073268A | Apparatus for braze-bonding metallic parts | Expired / Lapsed | 1957-04-04 | 1963-01-15 | 1 | Details |
| US3071676A | Temperature controlled oven | Expired / Lapsed | 1961-01-13 | 1963-01-01 | 1 | Details |
| US3071701A | Blocking oscillator controlled electronic switch | Expired / Lapsed | 1959-05-14 | 1963-01-01 | 0 | Details |
| US3066242A | Electroluminescent display panel | Expired / Lapsed | 1960-02-03 | 1962-11-27 | 0 | Details |
| US3061685A | Electronic switching telephone system | Expired / Lapsed | 1958-09-15 | 1962-10-30 | 0 | Details |
| US3056031A | Electro-optical device and circuitry | Expired / Lapsed | 1959-12-21 | 1962-09-25 | 0 | Details |
| US3054057A | Digitally tuned transmitter-receiver | Expired / Lapsed | 1960-07-13 | 1962-09-11 | 0 | Details |
| US3051787A | Buffer storage between magnetic tape and synchronous output | Expired / Lapsed | 1958-09-04 | 1962-08-28 | 0 | Details |
| US3047871A | Electronic printer | Expired / Lapsed | 1958-03-31 | 1962-07-31 | 0 | Details |
| US3041502A | Circuit interrupter | Expired / Lapsed | 1959-12-02 | 1962-06-26 | 0 | Details |
| US3041414A | Semiconductor magnetic pickup | Expired / Lapsed | 1958-10-02 | 1962-06-26 | 0 | Details |
| US3035184A | Linear delay device | Expired / Lapsed | 1958-08-25 | 1962-05-15 | 0 | Details |
| US3028589A | Motion digitizer | Expired / Lapsed | 1959-04-06 | 1962-04-03 | 0 | Details |
| US3025520A | Positioning determining device | Expired / Lapsed | 1955-11-21 | 1962-03-13 | 0 | Details |
| US3020360A | Pronunciary | Expired / Lapsed | 1959-01-29 | 1962-02-06 | 0 | Details |
| US3020530A | System for displaying coded information on cathode ray tubes | Expired / Lapsed | 1958-08-04 | 1962-02-06 | 0 | Details |
| US3020175A | Chemical cleaning of printed circuits | Expired / Lapsed | 1958-06-12 | 1962-02-06 | 2 | Details |
| US3020441A | Character beam-shaped tube | Expired / Lapsed | 1957-10-09 | 1962-02-06 | 0 | Details |
| US3015477A | Coal-rock sensing device | Expired / Lapsed | 1958-08-20 | 1962-01-02 | 0 | Details |
| US3014185A | D. c. magnetic amplifier | Expired / Lapsed | 1956-11-27 | 1961-12-19 | 0 | Details |
| US3011160A | Error detection and compensation for quantized signal recor… | Expired / Lapsed | 1960-03-23 | 1961-11-28 | 0 | Details |
| US3011052A | Transistor squelch circuit | Expired / Lapsed | 1958-09-15 | 1961-11-28 | 0 | Details |
| US3010677A | Missile control system | Expired / Lapsed | 1957-11-12 | 1961-11-28 | 0 | Details |
| US3007416A | Pump for cellular fluid such as blood and the like | Expired / Lapsed | 1958-08-13 | 1961-11-07 | 0 | Details |
| US3008029A | Means and method for testing of composite sandwich structur… | Expired / Lapsed | 1957-06-07 | 1961-11-07 | 0 | Details |
| US3007136A | Non-resetting allotter device | Expired / Lapsed | 1959-04-13 | 1961-10-31 | 0 | Details |
| US3007060A | Circuitry for independently delaying the leading and traili… | Expired / Lapsed | 1959-03-23 | 1961-10-31 | 0 | Details |
| US3006233A | Optical navigational instruments | Expired / Lapsed | 1957-12-16 | 1961-10-31 | 0 | Details |
| US2997540A | Binary information communication system | Expired / Lapsed | 1960-08-31 | 1961-08-22 | 0 | Details |
| US2996348A | Automatic tracer-playback system for machine tools | Expired / Lapsed | 1959-02-17 | 1961-08-15 | 0 | Details |
| US2995706A | Logarithmic scale meter | Expired / Lapsed | 1957-12-11 | 1961-08-08 | 0 | Details |
| US2992327A | Squelch circuit for transistor superregenerative receivers | Expired / Lapsed | 1958-05-15 | 1961-07-11 | 0 | Details |
| US2989990A | Valve | Expired / Lapsed | 1959-07-09 | 1961-06-27 | 0 | Details |
| US2988699A | Linear d. c. micromicroammeter | Expired / Lapsed | 1958-04-09 | 1961-06-13 | 0 | Details |
| US2986602A | Multiplex communication system | Expired / Lapsed | 1958-10-07 | 1961-05-30 | 0 | Details |
| US2986655A | Variable level gating circuit | Expired / Lapsed | 1958-04-14 | 1961-05-30 | 0 | Details |
| US2981893A | Bistable multivibrator utilizing miller integrators to regu… | Expired / Lapsed | 1960-03-10 | 1961-04-25 | 0 | Details |
| US2979570A | Time division multiplex communication system | Expired / Lapsed | 1959-08-31 | 1961-04-11 | 0 | Details |
| US2979565A | Multiplexing synchronizer | Expired / Lapsed | 1959-04-15 | 1961-04-11 | 0 | Details |
| US2979709A | Real time binary coded decimal-todecimal converter | Expired / Lapsed | 1958-11-12 | 1961-04-11 | 0 | Details |
| US2976907A | Metal forming device and method | Expired / Lapsed | 1958-08-28 | 1961-03-28 | 0 | Details |
| US2976469A | Motor control circuit | Expired / Lapsed | 1959-12-14 | 1961-03-21 | 0 | Details |
| US2970308A | Parallel digital to a. c. analog converter | Expired / Lapsed | 1957-08-07 | 1961-01-31 | 0 | Details |
| US2968696A | Electronic telephone system | Expired / Lapsed | 1956-06-01 | 1961-01-17 | 0 | Details |
| US2964252A | Control system | Expired / Lapsed | 1957-01-24 | 1960-12-13 | 0 | Details |
| US2964241A | Reversible decade counter | Expired / Lapsed | 1956-12-28 | 1960-12-13 | 0 | Details |
| US2960906A | Advanced flight control instrumentation and control system | Expired / Lapsed | 1957-08-08 | 1960-11-22 | 0 | Details |
| US2951185A | Printed circuit subassemblies and test fixtures | Expired / Lapsed | 1956-12-28 | 1960-08-30 | 0 | Details |
| US2949603A | Relative distance and movement indicator | Expired / Lapsed | 1957-02-18 | 1960-08-16 | 0 | Details |
| US2947819A | Electronic switching telephone system | Expired / Lapsed | 1958-03-13 | 1960-08-02 | 0 | Details |
| US2946987A | Reversible magnetic shift register | Expired / Lapsed | 1958-06-16 | 1960-07-26 | 0 | Details |
| US2945093A | Range selector (telegraph switching) | Expired / Lapsed | 1957-02-21 | 1960-07-12 | 0 | Details |
| US2943220A | Cathode-ray apparatus | Expired / Lapsed | 1957-01-31 | 1960-06-28 | 0 | Details |
| US2941191A | Character sequence detector | Expired / Lapsed | 1958-04-16 | 1960-06-14 | 0 | Details |
| US2935572A | Electrical signaling system | Expired / Lapsed | 1958-09-15 | 1960-05-03 | 0 | Details |
| US2935627A | Priority demand circuits | Expired / Lapsed | 1958-08-20 | 1960-05-03 | 0 | Details |
| US2935656A | Annunciator device | Expired / Lapsed | 1956-05-15 | 1960-05-03 | 0 | Details |
| US2933249A | Accumulator | Expired / Lapsed | 1957-08-07 | 1960-04-19 | 0 | Details |
| US2932971A | Temperature indicator | Expired / Lapsed | 1957-02-11 | 1960-04-19 | 0 | Details |
| US2932714A | Transistor temperature regulator | Expired / Lapsed | 1957-02-14 | 1960-04-12 | 0 | Details |
| US2932005A | Electronic switching system common control equipment | Expired / Lapsed | 1958-06-23 | 1960-04-05 | 0 | Details |
| US2931922A | Electronic ring counter having sequentially triggered bista… | Expired / Lapsed | 1958-02-24 | 1960-04-05 | 0 | Details |
| US2927735A | Frequency-control system | Expired / Lapsed | 1956-09-19 | 1960-03-08 | 0 | Details |
| US2927458A | Multiple stage load indicator | Expired / Lapsed | 1955-10-28 | 1960-03-08 | 0 | Details |
| US2923777A | Queue store circuit | Expired / Lapsed | 1958-04-18 | 1960-02-02 | 0 | Details |
| US2923488A | Winding and reeling control system | Expired / Lapsed | 1956-10-08 | 1960-02-02 | 0 | Details |
| US2921972A | Heat sensing apparatus | Expired / Lapsed | 1956-12-27 | 1960-01-19 | 0 | Details |
| US2922032A | Superregenerative detector | Expired / Lapsed | 1956-10-04 | 1960-01-19 | 0 | Details |
| US2918835A | Template-guided machine tool | Expired / Lapsed | 1956-01-25 | 1959-12-29 | 0 | Details |
| US2918609A | Electronically controlled relay | Expired / Lapsed | 1956-03-06 | 1959-12-22 | 0 | Details |
| US2915940A | Optical alignment gage | Expired / Lapsed | 1957-12-31 | 1959-12-08 | 0 | Details |
| US2908765A | Concentrator for telephone answering service | Expired / Lapsed | 1958-04-10 | 1959-10-13 | 0 | Details |
| US2905491A | Turnbuckle | Expired / Lapsed | 1958-01-02 | 1959-09-22 | 0 | Details |
| US2898176A | System for effecting transfer of cathode ray tube displays … | Expired / Lapsed | 1957-08-26 | 1959-08-04 | 0 | Details |
| US2898526A | Trigger circuit for use in time division multiplex systems | Expired / Lapsed | 1956-05-16 | 1959-08-04 | 0 | Details |
| US2897272A | Coin control telephone system | Expired / Lapsed | 1955-07-26 | 1959-07-28 | 0 | Details |
| US2895124A | Magnetic core data storage and readout device | Expired / Lapsed | 1957-05-08 | 1959-07-14 | 0 | Details |
| US2894068A | Automatic subscriber identification system | Expired / Lapsed | 1955-09-26 | 1959-07-07 | 0 | Details |
| US2894074A | Telephone conference circuit | Expired / Lapsed | 1955-02-25 | 1959-07-07 | 0 | Details |
| US2892890A | Intercept circuit | Expired / Lapsed | 1956-05-22 | 1959-06-30 | 0 | Details |
| US2892036A | Station identifying circuit | Expired / Lapsed | 1957-02-11 | 1959-06-23 | 0 | Details |
| US2889537A | Electronic selector switch | Expired / Lapsed | 1955-10-28 | 1959-06-02 | 0 | Details |
| US2889408A | Telephone system | Expired / Lapsed | 1954-02-03 | 1959-06-02 | 0 | Details |
| US2886656A | Electronic switching telephone system | Expired / Lapsed | 1958-06-04 | 1959-05-12 | 0 | Details |
| US2886643A | Playback system for toll ticketing | Expired / Lapsed | 1956-09-21 | 1959-05-12 | 0 | Details |
| US2878441A | Shielded transformer | Expired / Lapsed | 1956-07-17 | 1959-03-17 | 0 | Details |
| US2877133A | Electrostatic photography | Expired / Lapsed | 1956-10-22 | 1959-03-10 | 2 | Details |
| US2871295A | Automatic frequency correction in suppressed carrier commun… | Expired / Lapsed | 1956-10-29 | 1959-01-27 | 0 | Details |
| US2871399A | Electronic counter | Expired / Lapsed | 1956-08-22 | 1959-01-27 | 0 | Details |
| US2867724A | Control circuit | Expired / Lapsed | 1956-11-23 | 1959-01-06 | 0 | Details |
| US2866909A | Electronic switch | Expired / Lapsed | 1957-01-17 | 1958-12-30 | 0 | Details |
| US2863491A | Bonding press | Expired / Lapsed | 1951-06-14 | 1958-12-09 | 0 | Details |
| US2863073A | Remote supervisory control system | Expired / Lapsed | 1957-07-26 | 1958-12-02 | 0 | Details |
| US2863001A | Electronic telephone system | Expired / Lapsed | 1956-05-16 | 1958-12-02 | 0 | Details |
| US2859427A | Image-to-code translation system | Expired / Lapsed | 1957-06-11 | 1958-11-04 | 0 | Details |
| US2858518A | Fluid tight electrical connection | Expired / Lapsed | 1957-05-01 | 1958-10-28 | 0 | Details |
| US2854519A | Telephone system including line identifying means | Expired / Lapsed | 1956-04-18 | 1958-09-30 | 0 | Details |
| US2850657A | Cathode ray tube current amplifying means | Expired / Lapsed | 1956-08-20 | 1958-09-02 | 0 | Details |
| US2850723A | Translation and display apparatus | Expired / Lapsed | 1953-03-04 | 1958-09-02 | 0 | Details |
| US2848549A | Electronic telephone system | Expired / Lapsed | 1956-05-16 | 1958-08-19 | 0 | Details |
| US2846874A | Ultrasonic testing device | Expired / Lapsed | 1956-02-24 | 1958-08-12 | 0 | Details |
| US2845492A | Key telephone system | Expired / Lapsed | 1957-03-14 | 1958-07-29 | 0 | Details |
| US2841657A | Traffic monitor for electronic telephone system | Expired / Lapsed | 1955-03-18 | 1958-07-01 | 0 | Details |
| US2841461A | Apparatus for magnetic printing | Expired / Lapsed | 1952-07-26 | 1958-07-01 | 0 | Details |
| US2840637A | System for converting telegraphic code into characters | Expired / Lapsed | 1955-02-28 | 1958-06-24 | 0 | Details |
| US2836659A | Local first selector circuit | Expired / Lapsed | 1954-04-05 | 1958-05-27 | 0 | Details |
| US2833941A | Automation system | Expired / Lapsed | 1955-11-02 | 1958-05-06 | 0 | Details |
| US2831972A | Pulse generator | Expired / Lapsed | 1954-06-04 | 1958-04-22 | 0 | Details |
| US2830120A | Electronic switching system | Expired / Lapsed | 1955-03-04 | 1958-04-08 | 0 | Details |
| US2830124A | Electronic telephone system | Expired / Lapsed | 1955-03-04 | 1958-04-08 | 0 | Details |
| US2829308A | Cold-cathode binary decade counter | Expired / Lapsed | 1955-11-16 | 1958-04-01 | 0 | Details |
| US2827519A | Subscriber line ringing in an electronic telephone system | Expired / Lapsed | 1955-05-16 | 1958-03-18 | 0 | Details |
| US2827516A | Electronic switching means | Expired / Lapsed | 1954-04-23 | 1958-03-18 | 0 | Details |
| US2826691A | Oscillation generator | Expired / Lapsed | 1954-02-03 | 1958-03-11 | 0 | Details |
| US2824229A | Direct current potential generator | Expired / Lapsed | 1951-05-11 | 1958-02-18 | 0 | Details |
| US2823322A | Electronic switch | Expired / Lapsed | 1955-08-23 | 1958-02-11 | 0 | Details |
| US2817775A | Control circuit | Expired / Lapsed | 1956-11-13 | 1957-12-24 | 0 | Details |
| US2816262A | Voltage sensitive device | Expired / Lapsed | 1956-04-23 | 1957-12-10 | 0 | Details |
| US2816238A | Electronic switches | Expired / Lapsed | 1955-08-18 | 1957-12-10 | 0 | Details |
| US2811665A | Analog data converter | Expired / Lapsed | 1953-01-19 | 1957-10-29 | 0 | Details |
| US2810081A | Electronic switch for selectively blocking or permitting th… | Expired / Lapsed | 1955-09-27 | 1957-10-15 | 0 | Details |
| US2810080A | Transistor circuits | Expired / Lapsed | 1955-03-18 | 1957-10-15 | 0 | Details |
| US2805360A | Image storage apparatus | Expired / Lapsed | 1954-10-08 | 1957-09-03 | 0 | Details |
| US2803769A | Cathode ray apparatus | Expired / Lapsed | 1952-07-07 | 1957-08-20 | 0 | Details |
| US2792525A | Time selection circuit | Expired / Lapsed | 1952-02-23 | 1957-05-14 | 0 | Details |
| US2782574A | Work holder | Expired / Lapsed | 1954-09-16 | 1957-02-26 | 0 | Details |
| US2777745A | Electrostatic recording apparatus | Expired / Lapsed | 1952-10-04 | 1957-01-15 | 0 | Details |
| US2774888A | Electronic switch | Expired / Lapsed | 1955-08-23 | 1956-12-18 | 0 | Details |
| US2773937A | Electronic signaling and switching system | Expired / Lapsed | 1950-02-04 | 1956-12-11 | 0 | Details |
| US2757240A | Gating circuit for lines incoming to an operator's position | Expired / Lapsed | 1954-12-21 | 1956-07-31 | 0 | Details |
| US2737587A | Transistor multivibrator | Expired / Lapsed | 1955-03-07 | 1956-03-06 | 0 | Details |
| US2736770A | Printer | Expired / Lapsed | 1952-06-25 | 1956-02-28 | 0 | Details |
| US2730708A | Cathode ray apparatus | Expired / Lapsed | 1952-10-28 | 1956-01-10 | 0 | Details |
| US2730699A | Telemetering system | Expired / Lapsed | 1952-02-01 | 1956-01-10 | 0 | Details |
| US2729730A | Pressure gauge | Expired / Lapsed | 1950-11-02 | 1956-01-03 | 0 | Details |
| US2725427A | Trunking arrangement for telecommunication system | Expired / Lapsed | 1952-05-03 | 1955-11-29 | 0 | Details |
| US2721990A | Apparatus for locating information in a magnetic tape | Expired / Lapsed | 1952-10-17 | 1955-10-25 | 0 | Details |
| US2721743A | Mounting means for magnetic recording and/or reproducing he… | Expired / Lapsed | 1950-03-14 | 1955-10-25 | 0 | Details |
| US2721938A | Pulse generating means | Expired / Lapsed | 1950-01-27 | 1955-10-25 | 0 | Details |
| US2719225A | Pulse responsive circuit | Expired / Lapsed | 1950-04-20 | 1955-09-27 | 0 | Details |
| US2716893A | Means and apparatus for utilizing gyrodynamic energy | Expired / Lapsed | 1949-10-18 | 1955-09-06 | 0 | Details |