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Class Information
Number: 342/443
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Directive > Beacon or receiver > Direction-finding receiver only > Having a direction indicator
Description: Subject matter wherein the receiver includes a direction indicating device.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8648749 Estimation of multiple angles of arrival of signals received by an array of antenna elements Feb. 11, 2014
8581783 Metamaterial-based direction-finding antenna systems Nov. 12, 2013
8508409 Control method of wireless communication system, wireless communication system, adjustment method of array weight vector, and wireless communication device Aug. 13, 2013
8402636 Method of manufacturing ground-burial type solid insulated transformer Mar. 26, 2013
8260324 Establishing wireless links via orientation Sep. 4, 2012
8199053 Three dimensional RF search system Jun. 12, 2012
8077088 Method for single satellite geolocation of emitters using an ambiguous interferometer array Dec. 13, 2011
7667646 System and methods for direction finding using a handheld device Feb. 23, 2010
7663549 Incoming direction estimation apparatus Feb. 16, 2010
7642959 Method and apparatus for processing satellite signals at a satellite positioning system receiver Jan. 5, 2010
7495611 Method for determining signal direction using artificial doppler shifts Feb. 24, 2009
7436359 Method for single satellite geolocation of emitters using an ambiguous interferometer array Oct. 14, 2008
7428450 Method and system for using a database and GPS position data to generate bearing data Sep. 23, 2008
7427953 Wireless communication apparatus for determining direction of arrival information to form a three-dimensional beam used by a transceiver Sep. 23, 2008
7233288 Receiver for a position-finding system with improved sensitivity Jun. 19, 2007
7224311 System and method for visualization of attitude and attitude/position dependent data May. 29, 2007
7158079 Simple device and method to return a user to a location Jan. 2, 2007
7116272 Direction and distance finder for locating distress signals Oct. 3, 2006
7106251 Receiver in a position-finding system and method for position-finding with increased sensitivity Sep. 12, 2006
7084812 Method and device for tracking the directions-of-arrival of radio waves Aug. 1, 2006
6996420 Radio communication system, mobile terminal unit thereof, and azimuth determining method Feb. 7, 2006
6992622 Wireless communication method and antenna system for determining direction of arrival information to form a three-dimensional beam used by a transceiver Jan. 31, 2006
6933889 Direction and distance finder Aug. 23, 2005
6922170 Methods and apparatus for determining a direction of arrival in a wireless communication system Jul. 26, 2005
H2109 Passive microwave direction finding with monobit fourier transformation receiver and matrix coupled antenna Sep. 7, 2004
6731955 Radio communication system, mobile terminal unit thereof, and azimuth determining method May. 4, 2004
6633813 Navigation system for supplementary representation of directional information Oct. 14, 2003
6542120 Solar powered GPS device Apr. 1, 2003
6292137 Direction indicating compasses Sep. 18, 2001
6202035 System for determining time or direction for prayer Mar. 13, 2001
6185157 Timepiece including a GPS receiver, arranged in particular, for indicating the direction of a "target" location Feb. 6, 2001
6097315 Multi-indicator aviation pilot collision alert Aug. 1, 2000
6069585 Personal direction finding apparatus May. 30, 2000
5905464 Personal direction-finding apparatus May. 18, 1999
5861846 Aviation pilot collision alert Jan. 19, 1999
5831260 Hybrid motion tracker Nov. 3, 1998
5652578 Home base directional indicator Jul. 29, 1997
5587718 Method for discovering and designating air targets Dec. 24, 1996
5568154 System and a method for the instantaneous determination of the frequencies and angles of arrival of simultaneously incoming RF signals Oct. 22, 1996
5543802 Position/navigation device and method Aug. 6, 1996
5534872 Portable radio signal detecting system Jul. 9, 1996
5406291 Passive emitter location system Apr. 11, 1995
5307072 Non-concentricity compensation in position and orientation measurement systems Apr. 26, 1994
5305010 Crystal oscillator synchronized digital very high frequency omni-range (VOR) instrumentation unit Apr. 19, 1994
5173709 Electronic direction finder Dec. 22, 1992
5111210 Collision avoidance radar detector system May. 5, 1992
5053784 Apparatus and method for measuring the azimuth and elevation of an object Oct. 1, 1991
4983983 Semi-automatic direction finding set Jan. 8, 1991
4862180 Discrete source location by adaptive antenna techniques Aug. 29, 1989
4754281 Direction finder operating according to the Watson-Watt principle Jun. 28, 1988

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