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Class Information
Number: 342/414
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
Description: Subject matter in which a beacon is caused to radiate along two fixed, angularly disposed, directional patterns with radiations in each pattern being given a modulation which is a distinctive frequency.

Sub-classes under this class:

Class Number Class Name Patents
342/415 Coded equi-signal (e.g., a and n type) 4
342/416 Sequentially effective reflectors 2

Patents under this class:

Patent Number Title Of Patent Date Issued
8207892 Technique for determining an angle of arrival in a communication system Jun. 26, 2012
7636620 Signal distribution device operating in aircraft instrumental landing systems Dec. 22, 2009
5045859 Phase reference navigation system and method Sep. 3, 1991
4586049 Apparatus and method for use in instrument landing system localizer and glide-slope receivers for deriving course deviation information Apr. 29, 1986
4414632 Automatic monitoring system for radio signal Nov. 8, 1983
4195300 Device for simulating the locating signals of an ILS beacon Mar. 25, 1980
3971026 Multiple beam glide slope radio navigation method with two classes of beams Jul. 20, 1976
RE28762 Radio navigational aid with separate standard frequency signal Apr. 6, 1976
3946387 Method and apparatus for adjustment of modulation course patterns in a navigational system Mar. 23, 1976

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