| Patents for G01S 3 - Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received (11,105) |
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| 12/08/1981 | US4305141 Low-frequency directional sonar systems |
| 12/08/1981 | US4305077 System for measuring current position and/or moving direction of vehicle |
| 12/08/1981 | US4305074 Electromagnetic detection apparatus |
| 12/08/1981 | US4304993 Solar energy collection system |
| 12/01/1981 | US4303922 Method for reducing errors due to source amplitude modulation in a sequential amplitude comparison direction finding system |
| 11/24/1981 | US4302835 Multiple terminal passive multiplexing apparatus |
| 11/24/1981 | US4302759 Radio direction finder |
| 11/24/1981 | US4302710 Sun tracking controller |
| 11/17/1981 | US4301523 Measurement and compensation system for beam forming array |
| 11/17/1981 | US4301522 Formation of sonar channels by charge-coupled devices |
| 11/10/1981 | CA1112342A1 Direction finding apparatus |
| 11/03/1981 | US4298875 Aircraft collision avoidance system |
| 11/03/1981 | CA1111956A1 Switching method for measuring two neighboring flying targets in succession |
| 10/27/1981 | US4297704 Phase sensitive spectrum analyzer |
| 10/27/1981 | US4297572 Tracking solar energy collector assembly |
| 10/27/1981 | US4296735 Devices to exploit solar energy |
| 10/21/1981 | EP0038151A1 Remote object position and orientation locator |
| 10/20/1981 | US4295740 Photoelectric docking device |
| 10/20/1981 | US4295463 Flexible V-shaped solar tracking concentrating solar energy collector |
| 10/14/1981 | EP0037725A1 Apparatus for determining the position of a source of electromagnetic radiation relative to a remote object |
| 10/01/1981 | WO1981002781A1 Optical position sensor |
| 09/30/1981 | EP0036531A1 Radio direction finder |
| 09/29/1981 | US4292639 Quasi-doppler direction finding equipment |
| 09/29/1981 | US4291978 Apparatus for automatically determining the position at which a beam of light impinges on a target |
| 09/29/1981 | US4291677 Solar energy collector |
| 09/22/1981 | US4290411 Solar energy collector sun-tracking apparatus and method |
| 09/22/1981 | CA1109537A1 Free-gyro seeker |
| 09/09/1981 | EP0035101A1 Method and apparatus for detecting and tracking air and ground targets |
| 09/02/1981 | EP0034772A1 Device for determining the angular position of a target illuminated by light pulses |
| 09/01/1981 | US4287412 Photoelectric direction finder |
| 09/01/1981 | US4287411 Apparatus for seeking and following a luminous zone, such as the sun |
| 09/01/1981 | US4286760 Photoelectric direction finder |
| 08/25/1981 | US4286289 Touch screen target designator |
| 08/18/1981 | US4284063 Solar power generating system |
| 08/18/1981 | US4283914 Solar energy system |
| 08/12/1981 | EP0033679A1 Laser object-designation system |
| 08/11/1981 | US4283767 Multiple correlator reference processor |
| 08/11/1981 | US4283670 Automatic integrator control for transientless switching of _controller gains in manual tracking systems |
| 08/05/1981 | EP0033237A1 Information gathering system multiplexing apparatus |
| 08/04/1981 | CA1106487A1 Device for the determination of relative positions relating to lengthwise elements towed by a ship |
| 07/28/1981 | US4281342 Mark detecting system using image pickup device |
| 07/22/1981 | EP0032220A1 Direction finder utilizing simulated rotation of the antenna pattern |
| 07/21/1981 | US4280128 Adaptive steerable null antenna processor |
| 07/15/1981 | EP0032002A2 Sun following-up device for solar heat utilization apparatus |
| 07/14/1981 | US4279027 Acoustic sensor |
| 07/14/1981 | US4278430 Signal simulator |
| 07/08/1981 | EP0031750A1 Acoustic goniometer |
| 07/07/1981 | US4277788 Direction determining apparatus responsive to electromagnetic radiation |
| 07/07/1981 | US4277771 Electric induction field navigation apparatus |
| 07/07/1981 | US4277748 Angle digitizer |
| 07/07/1981 | US4277170 Laser beacon and optical detector system for aircraft collision hazard determination |
| 06/30/1981 | US4276550 Scan pattern estimator for an electromagnetic sensor |
| 06/30/1981 | CA1104250A1 Method for controlling an antenna of an earth station for telecommunication via satellites |
| 06/23/1981 | US4275461 Parallel digital beam-forming system |
| 06/23/1981 | US4275399 Apparatus for determining the direction of arrival of applied energy |
| 06/23/1981 | US4274609 Target and missile angle tracking method and system for guiding missiles on to targets |
| 06/23/1981 | CA1103803A1 Method and apparatus of determining the center of area or centroid of a geometrical area of unspecified shape lying in a larger x-y scan field |
| 06/16/1981 | US4274148 Digital time-delay beamformer for sonar systems |
| 06/16/1981 | US4273446 Light spot position sensor for a wavefront sampling system |
| 06/10/1981 | EP0029989A1 Helicopter detecting and identifying device |
| 06/09/1981 | US4272783 Correlation follower for tracking an object |
| 06/02/1981 | CA1102432A1 Controlled beam projector |
| 05/26/1981 | US4270143 Cross-correlation video tracker and method |
| 05/26/1981 | US4270048 Apparatus for determining the angle of incident electromagnetic radiation |
| 05/26/1981 | US4270044 Optical reference gyro |
| 05/26/1981 | CA1101981A1 Beam forming system |
| 05/19/1981 | US4268863 Threshold selection circuit |
| 05/19/1981 | US4268829 Steerable null antenna processor with gain control |
| 05/19/1981 | CA1101542A1 Waveguide receiving antenna |
| 05/12/1981 | US4267441 Energy rays tracking device |
| 04/21/1981 | US4263597 Nondisruptive ADF system |
| 04/21/1981 | US4263596 Reference station for a distance-measuring system |
| 04/14/1981 | US4262195 Solar tracking system |
| 04/07/1981 | CA1099007A1 Resolving angular ambiguity |
| 03/17/1981 | US4256088 Solar concentrator utilizing a point focusing solar concentrating panel assembly |
| 03/10/1981 | US4255765 Theodolite for tracking and measuring a flying object with a TV camera arranged at a telescope |
| 03/10/1981 | CA1097167A1 Solar energy heating apparatus |
| 02/25/1981 | EP0024262A1 Electroacoustic signalisation and submarine identification device of a ship |
| 02/11/1981 | EP0023606A1 Antenna system for locating the position of a microwave signal source |
| 02/10/1981 | US4250506 Sidelobe discriminator |
| 01/27/1981 | US4247922 Object position and condition detection system |
| 01/27/1981 | US4247900 Signal combiner with permuted addressing |
| 01/27/1981 | US4247857 Method for controlling an antenna of an earth station for telecommunication via satellites |
| 01/20/1981 | US4246581 Direction finder |
| 01/20/1981 | US4246480 Surveillance arrangement using arrays of infrared |
| 01/13/1981 | US4245220 Target location systems |
| 01/13/1981 | US4245153 Sun tracking system for solar collector |
| 01/13/1981 | US4244540 Spectral discrimination system for an optical seeker |
| 01/07/1981 | EP0021887A1 Optoelectric detection device, particularly for laser radiation |
| 01/07/1981 | EP0020795A1 An infrared tracking system |
| 01/06/1981 | US4243018 Solar energy concentrator |
| 12/30/1980 | US4242580 Solar-radiation collection apparatus |
| 12/30/1980 | CA1092343A1 Solar tracking device |
| 12/23/1980 | CA1092215A1 Multi-axis position determining system |
| 12/16/1980 | CA1091466A1 Scanning optical spectral analyzer |
| 11/26/1980 | EP0019428A1 Projectile locating apparatus |
| 11/25/1980 | US4236159 Passive direction finding system |
| 11/18/1980 | US4234893 Image drift correction apparatus |
| 11/18/1980 | US4234789 Observation optical apparatus |
| 11/18/1980 | US4234145 Radiant energy quadrant detection device |