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Browse by Category: Main > Communications
Class Information
Number: 342/458
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Directive > Position indicating (e.g., triangulation) > Distance
Description: Subject matter including means to determine the extent of a space between two points.










Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
6774846 System and method for position determination by impulse radio Aug. 10, 2004
6756901 Multi function electronic personal monitor and radio telemetry cell system Jun. 29, 2004
6748224 Local positioning system Jun. 8, 2004
6741209 Positioning system May. 25, 2004
6734823 Method and system for mapping and tracking information from a plurality of remote stations May. 11, 2004
6700538 System and method for estimating separation distance between impulse radios using impulse signal amplitude Mar. 2, 2004
6686881 Wireless identification and tracking using magnetic fields Feb. 3, 2004
6658258 Method and apparatus for estimating the location of a mobile terminal Dec. 2, 2003
6646603 Method of providing an estimate of a location Nov. 11, 2003
6639553 Passive/ranging/tracking processing method for collision avoidance guidance Oct. 28, 2003
6611234 System and method for position determination by impulse radio using round trip time-of-flight Aug. 26, 2003
6611233 Radio communication device and method of measuring distance Aug. 26, 2003
6580394 Method and apparatus for determining whether to employ an antenna array beamforming technique Jun. 17, 2003
6567038 Tracking system for sports May. 20, 2003
6563461 System, method, and software for non-iterative position estimation using range measurements May. 13, 2003
6538601 Hybrid system for position determination by a mobile communications terminal Mar. 25, 2003
6522297 Position location using ghost canceling reference television signals Feb. 18, 2003
6489922 Passive/ranging/tracking processing method for collision avoidance guidance and control Dec. 3, 2002
6486831 Methods and apparatus for estimating accuracy of measurement signals Nov. 26, 2002
6484034 Radio handset and position location system Nov. 19, 2002
6445344 Local area positioning system Sep. 3, 2002
6437743 Method and system for mapping and tracking information from a plurality of remote stations Aug. 20, 2002
6437732 Information terminal with positioning function, positioning system, method of positioning, storage medium, and computer program product Aug. 20, 2002
6421628 Signal handling device Jul. 16, 2002
6415224 Display method and apparatus for navigation system Jul. 2, 2002
6380891 GPS receiver with satellite frame synchronization process Apr. 30, 2002
6377215 Apparatus and method for detecting railroad locomotive turns by monitoring truck orientation Apr. 23, 2002
6373434 Distance detecting method and its apparatus Apr. 16, 2002
6347230 Position display system of mobile terminal Feb. 12, 2002
6321160 Navigation apparatus Nov. 20, 2001
6300905 Location finding using a single base station in CDMA/TDMA systems Oct. 9, 2001
6295019 System and method for distance measurement by inphase and quadrature signals in a radio system Sep. 25, 2001
6292138 Method of determining distance between diversity antennas Sep. 18, 2001
6275189 Passive target detection and identification system Aug. 14, 2001
6268829 Doppler direction finder and method of location using doppler direction finder Jul. 31, 2001
6239748 Method for use with analog FM cellular telephones May. 29, 2001
6229473 Arrangements for the one-dimensional or multi-dimensional determination of the position of a load suspension point in hoists May. 8, 2001
6222482 Hand-held device providing a closest feature location in a three-dimensional geometry database Apr. 24, 2001
6191739 Method and apparatus for detecting the movement of a device that receives a signal broadcast from a relative fixed position Feb. 20, 2001
6177907 Method and apparatus for determining an angle of arrival of a transmitted signal in a communication system Jan. 23, 2001
6163294 Time-tagging electronic distance measurement instrument measurements to serve as legal evidence of calibration Dec. 19, 2000
6161018 Method and system for estimating a subscriber's location in a wireless communication system service area Dec. 12, 2000
6161073 Apparatus and method for performing automatic control over velocity of automotive vehicle Dec. 12, 2000
6144858 Mobile communication terminal apparatus with reception level measurement control Nov. 7, 2000
6104337 Distance indicator system for golf Aug. 15, 2000
6087973 Increased accuracy of range measurement between data link systems Jul. 11, 2000
6031489 User terminal positioning system and method employing external signals Feb. 29, 2000
6020847 Geolocation method and apparatus for satellite based telecommunications system Feb. 1, 2000
5949350 Location method and apparatus Sep. 7, 1999
5936574 Device for monitoring the distance between two objects Aug. 10, 1999

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