| Patents for G01S 13 - Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified (37,701) |
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| 07/26/1977 | US4038655 Radar contour edge restore circuit |
| 07/12/1977 | US4035801 Multiple ranging DME |
| 07/12/1977 | US4035800 Short-pulse non-coherent MTI |
| 07/12/1977 | US4035799 Digital mean clutter doppler compensation system |
| 07/12/1977 | US4035798 Ultrasonic intrusion detection system |
| 07/12/1977 | US4035775 Temperature compensated acoustic surface wave device |
| 07/12/1977 | US4035760 Object detecting system |
| 07/05/1977 | US4034374 Sequential lobing track-while-scan radar |
| 07/05/1977 | US4034373 Airborne moving-target indicating radar system |
| 07/05/1977 | US4034372 Velocity gate hand-off system |
| 07/05/1977 | US4034371 Apparatus and methods for differentiating between synchronous and asynchronous response signals in secondary radar devices |
| 07/05/1977 | US4034370 Second order motion compensator for high resolution radar |
| 07/05/1977 | US4034288 System for measuring the frequency of an electrical signal |
| 06/28/1977 | US4032919 Device for secant correction of azimuth data in tracking radars |
| 06/21/1977 | US4031535 Multiple frequency navigation radar system |
| 06/21/1977 | US4031534 Noise resistant zone penetration detection system |
| 06/21/1977 | US4030420 Device for ground-controlled activation of proximity fuzes |
| 06/14/1977 | US4030099 Digital antenna control apparatus for a communications terminal |
| 06/14/1977 | US4030097 Muzzle velocity chronograph |
| 06/14/1977 | US4030065 Terrain clearance warning system for aircraft |
| 06/07/1977 | USRE29260 Proximity indication with range and bearing measurements |
| 06/07/1977 | US4028708 Antenna feed for dual beam conical scan tracking radar |
| 06/07/1977 | US4028707 Antenna for underground pipe detector |
| 06/07/1977 | US4028700 Pulse compression radar and method of operating such a radar |
| 06/07/1977 | US4028699 Search radar |
| 06/07/1977 | US4028698 DME apparatus and method |
| 06/07/1977 | US4028662 Passing vehicle signalling apparatus |
| 06/07/1977 | US4027840 Vehicle position indicator with radar interrogation each of spaced transponders disposed along a pathway for the vehicle |
| 05/31/1977 | US4027307 Proximity warning system using secondary radar |
| 05/31/1977 | US4027303 Apparatus for detecting the presence of objects by sensing reflected energy |
| 05/24/1977 | US4025922 Traffic control system |
| 05/17/1977 | US4024540 Continuous wave FM tone ranging radar with predetection averaging |
| 05/17/1977 | US4024539 Method and apparatus for flight path control |
| 05/17/1977 | US4024538 Electronic file and record keeper for secondary radar targets |
| 05/17/1977 | US4024537 Doppler-radar, projected terrain-clearance system |
| 05/17/1977 | US4024318 Radar shields |
| 05/10/1977 | US4023175 Imaging systems |
| 05/10/1977 | US4023172 Monopulse system for cancellation of side lobe effects |
| 05/10/1977 | US4023171 Microwave velocity sensor using altimeter echo |
| 05/10/1977 | US4023170 Charge transfer device range gate filter |
| 05/10/1977 | US4023169 Automatic frequency control circuit for frequency agile radar |
| 05/10/1977 | US4023168 Radar altimeter |
| 05/10/1977 | US4023167 Radio frequency detection system and method for passive resonance circuits |
| 05/10/1977 | US4023165 Signal modification techniques |
| 05/10/1977 | US4023135 Apparatus for detecting the number of objects |
| 05/03/1977 | US4021808 Real time threshold |
| 05/03/1977 | US4021803 Proximity sensing apparatus |
| 05/03/1977 | US4021802 Collision avoidance system |
| 05/03/1977 | US4021801 Single bit doppler processor for guidance missile system |
| 04/26/1977 | US4020490 Traffic radar and apparatus therefor |
| 04/26/1977 | US4020489 Sequential observer multi-functional friend accept decider |
| 04/26/1977 | US4020292 Band-compressor device |
| 04/26/1977 | US4019562 Automatic molding apparatus with means for controlling pouring rate |
| 04/19/1977 | US4019185 Phase modulation apparatus |
| 04/19/1977 | US4019184 Direction-finding method and system |
| 04/19/1977 | US4019181 Transponder system |
| 04/19/1977 | US4019180 Remote infrared signal communicator |
| 04/19/1977 | US4019179 Method of locating persons in distress |
| 04/12/1977 | US4017855 Spin echo matched filter ECM detector |
| 04/12/1977 | US4017854 Apparatus for angular measurement and beam forming with baseband radar systems |
| 04/12/1977 | US4017189 Testing of automobile headlights |
| 04/05/1977 | US4016568 Method and system for measuring doppler frequency shift of an echo |
| 04/05/1977 | US4016567 CCD range-doppler processor |
| 04/05/1977 | US4016566 Method for avoiding unwanted echo signals and automotive radar embodying same |
| 04/05/1977 | US4016565 Aircraft ground closure rate filtering method and means |
| 04/05/1977 | US4016564 Multiple target data receiver for a collision avoidance system |
| 04/05/1977 | US4016563 Method and apparatus for acousto-optic pulse compression |
| 04/05/1977 | US4016528 Moving target detector |
| 03/29/1977 | US4015266 Radar dipole antenna array |
| 03/29/1977 | US4015261 Time sharing circuit for guard radar receiver in radar ranging system |
| 03/29/1977 | US4015260 Digital MTI radar |
| 03/29/1977 | US4015259 Method and apparatus for interrogating and identifying fixed or moving targets |
| 03/29/1977 | US4015257 Radar detection of turbulence in precipitation |
| 03/22/1977 | US4014021 Radar for short range measurements |
| 03/22/1977 | US4014019 Real time analog doppler processor for weather radar |
| 03/15/1977 | US4012740 Radio-frequency direction-finding arrangement |
| 03/15/1977 | US4012736 Radar speedometer |
| 03/15/1977 | US4012730 Doppler detection device with integrator sampling means to inhibit false alarms |
| 03/15/1977 | US4012696 Multiple rate digital command detection system with range clean-up capability |
| 03/08/1977 | US4011564 Phase modulated monopulse system |
| 03/08/1977 | US4011563 Variable range automotive radar system |
| 03/08/1977 | US4011562 Single frequency radio ranging system |
| 03/08/1977 | US4011438 Simplified digital moving target indicator filter |
| 03/01/1977 | US4010468 Methods and apparatus for eliminating interference in radar systems |
| 03/01/1977 | US4010467 Missile post-multiple-target resolution guidance |
| 03/01/1977 | US4010465 Channel encoding for distance measurement equipment |
| 03/01/1977 | US4010459 Systems for the detection of moving objects within a survey area by microwave diffraction |
| 02/22/1977 | US4009476 Apparatus for automatically controlling door operation |
| 02/15/1977 | US4008475 Stabilizing and calibration circuit for FM-CW radar ranging systems |
| 02/15/1977 | US4008474 Doppler radar for distinguishing between approaching and receding targets and having increased frequency response |
| 02/15/1977 | US4008473 Collision predicting operation system |
| 02/15/1977 | US4008472 Marine radar transmission and reception system |
| 02/15/1977 | US4008471 Correlator to reduce bin straddle in a collision avoidance system |
| 02/15/1977 | US4008470 Passive ranging system |
| 02/15/1977 | US4008469 Signal processing in short-pulse geophysical radar system |
| 02/01/1977 | US4006481 Underground, time domain, electromagnetic reflectometry for digging apparatus |
| 02/01/1977 | US4006477 Pulse coherent transponder with precision frequency offset |
| 01/25/1977 | US4005423 Synthetic aperture radar utilizing a low-speed analog-to-digital converter |
| 01/25/1977 | US4005422 Radar with sampling gate circuit for video signal |
| 01/25/1977 | US4005421 Monopulse radar system and method for improved low elevation tracking |