| 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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| 09/12/1978 | US4114157 Bearing detection system | 
| 09/12/1978 | US4114153 Echo location systems | 
| 09/05/1978 | US4112430 Beamformer for wideband signals | 
| 09/05/1978 | US4112294 Radiant energy detection system for the angular location of a light-radiating object | 
| 09/05/1978 | US4111184 Sun tracking solar energy collector | 
| 08/29/1978 | US4110833 Balanced AC correlator system | 
| 08/22/1978 | US4109250 Circuit for the comparative vector measurement of radio signal pulses which arrive approximately simultaneously in a plurality of receivers | 
| 08/22/1978 | US4109232 Correction and transmission system for directional target information | 
| 08/22/1978 | US4108154 Solar energy collection system | 
| 08/22/1978 | US4108019 Solar tracking device | 
| 08/22/1978 | CA1037154A1 Acoustic direction finder | 
| 08/22/1978 | CA1037146A1 Direction finders | 
| 08/15/1978 | US4107692 Radio frequency signal direction finding system | 
| 08/15/1978 | US4107691 Antenna for phase front homing | 
| 08/15/1978 | US4107685 Beam forming system | 
| 08/15/1978 | US4107666 Variable pulse distribution electro-optical system | 
| 08/15/1978 | US4107530 Infrared acquisition device | 
| 08/15/1978 | US4107529 Dual mode seeker reticle | 
| 08/15/1978 | US4107521 Solar sensor and tracker apparatus | 
| 08/15/1978 | US4106726 Prestored area correlation tracker | 
| 08/15/1978 | US4106485 Solar energy reflecting system | 
| 08/08/1978 | US4106023 Navigation aid system | 
| 08/01/1978 | US4103847 Line scan area signature detection method | 
| 07/25/1978 | US4103304 Direction locating system | 
| 07/25/1978 | US4103151 Solar tracking system | 
| 07/25/1978 | US4102326 Central receiver solar collector using mechanically linked mirrors | 
| 07/18/1978 | US4101893 Aircraft landing aid for zero-zero visibility landings | 
| 07/18/1978 | US4100915 Solar energy heating apparatus | 
| 07/11/1978 | US4100546 Airborne antenna system employing the airframe as an antenna | 
| 07/11/1978 | US4100544 Beacon system employing ramped gain receiver | 
| 07/11/1978 | US4100472 Satellite tracking antenna system | 
| 07/04/1978 | US4098264 Solar liquid heating apparatus | 
| 06/27/1978 | US4097869 Orthogonal-port, biconical-horn, direction-finder antenna | 
| 06/27/1978 | US4097866 Multilevel sidelobe canceller | 
| 06/27/1978 | US4097155 Target locating system | 
| 06/13/1978 | US4094225 Target detecting and locating system | 
| 06/06/1978 | US4093934 Free-falling sonobuoy | 
| 05/30/1978 | US4092670 Video processor for solid state star tracker | 
| 05/30/1978 | US4092072 Optical sensors | 
| 05/23/1978 | US4091386 Rear window direction finding antenna | 
| 05/23/1978 | US4090498 Solar heater | 
| 05/16/1978 | US4090201 Rate augmented step track system | 
| 05/16/1978 | US4090200 Method for the comparative vector measurement of signal pulses arriving nearly simultaneously at several radio receiving stations | 
| 05/16/1978 | US4090070 Solar pointer | 
| 05/16/1978 | CA1031446A1 Apparatus for determining the direction of a plane wave | 
| 05/09/1978 | US4088999 RF beam center location method and apparatus for power transmission system | 
| 05/09/1978 | US4088120 Solar concentrator-collector | 
| 05/02/1978 | US4087817 ADF antenna | 
| 04/25/1978 | US4086485 Solar-radiation collection apparatus with tracking circuitry | 
| 04/11/1978 | US4084184 Tv object locator and image identifier | 
| 04/04/1978 | US4082947 Solar collector and drive circuitry control means | 
| 03/21/1978 | US4079591 Solar power plant | 
| 03/14/1978 | US4078549 Solar energy collector | 
| 03/07/1978 | US4078222 Direction determining apparatus | 
| 02/21/1978 | US4075633 Space adaptive coherent sidelobe canceller | 
| 02/07/1978 | US4072861 Optical tracking system | 
| 01/31/1978 | US4071845 Harbor radio navigation system | 
| 01/17/1978 | US4069469 System for collecting information in water | 
| 01/17/1978 | US4068653 Solar heating unit | 
| 01/10/1978 | US4068208 Marine streamer position determination system | 
| 01/03/1978 | US4067015 System and method for tracking a signal source | 
| 01/03/1978 | US4065860 Weapon training simulator | 
| 12/20/1977 | US4064528 Method and apparatus for enhancing a televised object | 
| 12/20/1977 | US4063815 Apparatus and method for optical tracking and aiming | 
| 12/06/1977 | US4062015 Rapid azimuthal determination of radio signals | 
| 12/06/1977 | US4061130 Solar energy device | 
| 11/29/1977 | US4060830 Volumetric balance video tracker | 
| 11/08/1977 | US4057803 Adaptive direction of arrival antennae system | 
| 11/01/1977 | US4056801 Apparatus for locating sources of sound in water | 
| 11/01/1977 | US4056720 Scanning point source optical energy detector | 
| 11/01/1977 | US4056715 Device for forming channels using detectors spaced out on a circular base | 
| 10/18/1977 | US4054873 Device for forming channels | 
| 10/11/1977 | US4053929 Contour fitting pictorial tracking gate | 
| 09/27/1977 | US4051350 Position measuring device | 
| 09/20/1977 | US4050072 Signal combining apparatus | 
| 09/13/1977 | US4048592 Arrangement for extracting divergence-measuring modes from a corrugated guide and tracking antenna incorporating same | 
| 09/13/1977 | US4047816 Attitude determination using two transmitter/receiver stations and skewed reflectors | 
| 09/06/1977 | US4047176 Method for the comparative vector measurement of signal pulses arriving nearly simultaneously at several radio receiving stations | 
| 09/06/1977 | US4047175 Television antenna directing and tracking system for television program network between air-borne and ground offices | 
| 08/30/1977 | US4045799 Radio locating unit for persons in distress | 
| 08/23/1977 | US4044377 Video target locator | 
| 08/23/1977 | US4044359 Multiple intermediate frequency side-lobe canceller | 
| 08/23/1977 | US4043672 Method and apparatus for detecting the direction of incidence of electromagnetic radiation | 
| 08/16/1977 | US4042931 Tracking system for multiple beam antenna | 
| 08/16/1977 | US4042930 Device for forming channels using detectors spaced out on a circular base | 
| 08/16/1977 | US4042929 Helicopter navigation system | 
| 08/16/1977 | US4042927 Ability of a monopulse radar to resolve and track jammers passively | 
| 08/09/1977 | US4041496 Automatic direction finding system | 
| 08/09/1977 | US4041494 Distance measuring method and apparatus | 
| 08/09/1977 | US4041307 Positioning a platform with respect to rays of a light source | 
| 08/02/1977 | US4040058 Direction finder | 
| 08/02/1977 | US4039246 Optical scanning apparatus with two mirrors rotatable about a common axis | 
| 07/12/1977 | US4035805 Satellite tracking antenna system | 
| 07/12/1977 | US4034949 Optical apparatus | 
| 07/05/1977 | US4034376 Radio direction finder with array element signal processing | 
| 07/05/1977 | US4034208 Acceleration aided tracking of a designated target | 
| 07/05/1977 | US4033179 Acoustic emission monitoring system | 
| 06/21/1977 | US4031500 Position measuring device | 
| 06/21/1977 | US4031444 Solar collector control system | 
| 06/21/1977 | US4031385 Solar tracking device |