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Class Information
Number: 342/112
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Determining velocity > Combined with determining distance > With plural frequencies transmission
Description: Subject matter including transmitting two or more discrete frequencies and determining distance from changes in each of the received frequencies.

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
4388622 Double sideband linear frequency modulation system for radar applications Jun. 14, 1983
4188630 Method of and system for avoiding collisions between aircraft Feb. 12, 1980
4101888 Anticollision car radar Jul. 18, 1978
4087815 Hybrid digital-optical radar signal processor May. 2, 1978
4078235 Obstacle detecting system Mar. 7, 1978
3978481 Anti-collision vehicular radar system Aug. 31, 1976
3952303 Doppler radar for forecasting collision Apr. 20, 1976

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