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Class Information
Number: 342/438
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Directive > Beacon or receiver > Direction-finding receiver only > With plural fixed antenna pattern comparing > Including separate indicators
Description: Subject matter wherein the comparison is made by use of two or more distinct indicating devices.

Patents under this class:

Patent Number Title Of Patent Date Issued
8686913 Differential vector sensor Apr. 1, 2014
7755534 Radar sensor for receiving radar wave while judging existence of wave attenuator Jul. 13, 2010
4475106 High sensitivity portable radio direction finder Oct. 2, 1984
4263597 Nondisruptive ADF system Apr. 21, 1981
4177467 Waveguide receiving antenna Dec. 4, 1979
3965473 Direction finders Jun. 22, 1976
3936832 System to process antenna beams to obtain the angular location of target with high resolution and accuracy Feb. 3, 1976

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