Directive > Beacon or receiver > With transmisson of bearing or position determinative signals > Fixed course or bearing indicating > Distinctive frequencies equi-signal type > Patents

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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