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Class Information
Number: 342/415
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Directive > Beacon or receiver > With transmisson of bearing or position determinative signals > Fixed course or bearing indicating > Distinctive frequencies equi-signal type > Coded equi-signal (e.g., a and n type)
Description: Subject matter in which a beacon is caused to alternately radiate in accordance with either one of two fixed angularly disposed directional patterns with the alternations being so timed that the radiation is each pattern is interrupted in accordance with a code which is distinctive with that pattern.

Patents under this class:

Patent Number Title Of Patent Date Issued
7636620 Signal distribution device operating in aircraft instrumental landing systems Dec. 22, 2009
4721899 Combined air-direct testing simulator Jan. 26, 1988
4642647 Signal generator for radio navigation system Feb. 10, 1987
4298875 Aircraft collision avoidance system Nov. 3, 1981

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