James J Wang, Robert M Grayson: Golf course ranging and direction-finding system using spread-spectrum radiolocation techniques. Hoffman Wasson & Gitler, October 8, 1991: US05056106 (180 worldwide citation)

The invention disclosed herein is directed to a method and apparatus which employs a spread-spectrum based radiolocation system, using hand-held receiver units and fixed-position reference transmitters, to determine distance and direction between a golfer and key locations on a golf course, such as ...

David C Kelley, Joseph Cisneros, Louis A Greenbaum: Navigation and positioning system and method using uncoordinated becon signals. Pinterra Corporation, Gary S Flehr Hohbach Test Albritton & Herbert Williams, November 18, 1997: US05689270 (110 worldwide citation)

A positioning system uses a multiplicity of commercial broadcast stereo FM radio signal transmitters, at known fixed locations, each of which transmits a beacon signal having a phase that is un-synchronized with the phases of the beacon signals of the other transmitters. All the beacon signals have ...

Kazuaki Takahashi, Masayuki Orihashi, Suguru Fujita: Wireless communication device and method for displaying estimated direction and position of a target for wireless communication. Panasonic Intellectual Property Management, Seed IP Law Group PLLC, December 22, 2015: US09219307 (74 worldwide citation)

A wireless communication device transmits and receives a signal by a wireless communication using a millimeter wave frequency band. The wireless communication device includes an antenna section having directivities in a plurality of different directions, an antenna control section adapted to form a ...

Jeffrey F Bull, Robert J Anderson, Thomas Stephan Ginter, Matthew L Ward: Augmentation of commercial wireless location system (WLS) with moving and/or airborne sensors for enhanced location accuracy and use of real-time overhead imagery for identification of wireless device locations. TruePosition, Woodcock Washburn, September 23, 2008: US07427952 (68 worldwide citation)

Mobile LMUs can be used in a Wireless Location System to provide detection coverage in areas lacking adequate receiver coverage. The mobile LMUs can be used to detect the radio frequency (RF) transmissions from wireless handsets and devices over a period of time to permit determination of their loca ...

Andrew Martin Robert Ward: Calibration of a location system. Ubisense, Rothwell Figg Ernst & Manbeck P C, June 5, 2012: US08193984 (54 worldwide citation)

A location system comprising a plurality of base units for enabling the locating of a device by means of one or more location signals communicated between the device and the base units and signal processing equipment for: i. determining the location of the device in dependence on the manner in which ...

Roy E Anderson: Radio determination using satellites transmitting timing signals with correction by active range measurement. General Electric Company, Donald R Campbell, Joseph T Cohen, Marvin Snyder, July 17, 1979: US04161730 (50 worldwide citation)

The time-of-arrival of timing signals transmitted by two satellites is measured relative to a crystal clock, and an approximate position fix is computed for the ship or other object being located. Because of clock error the position fixes are displaced along a hyperbolic line of position. A two-way ...

Hiroyasu Ishikawa, Hideyuki Shinonaga, Hideo Kobayashi: Method for determining position of mobile earth station in satellite communication system. Kokusai Denshin Denwa Kabushiki Kaisha, Lackenbach Siegel Marzullo Aronson & Greenspan P C, October 19, 1999: US05969669 (25 worldwide citation)

A method is disclosed for uniquely determining the position of a mobile earth station in a mobile satellite communication system which employs a non-geostationary satellite with a multi-spot beams. A given point of a preknown position on the earth surface is defined as the center coordinate of a thr ...

Kenichi Inamiya: Positioning method utilizing artificial satellites in geosynchronous altitude orbits. Mitsubishi Denki Kabushiki Kaisha, Wolf Greenfield & Sacks, November 3, 1992: US05160935 (20 worldwide citation)

A method of positioning an observation point utilizing artificial satellites. In order to make it possible to make a range measurement in areas within the latitude of 65 degrees where almost all people in the world reside, a predetermined first number of satellites, for example, ten satellites are p ...

Robert C Martin: High energy laser target board. The United States of America represented by the Secretary of the Army, Nathan Edelberg, Robert P Gibson, Robert C Sims, March 30, 1982: US04321824 (11 worldwide citation)

The target board has an array of discs calorineters spread around the surface to receive the laser energy. The energy striking a disc is sensed by a pair of thermal leads connected to the back side of the disc and the voltage cross the lead is amplified and sent to a recording system.

Henry H Liao: Method and system for locating a geographical position using broadcast frequency modulation signals. August 2, 2011: US07990314 (8 worldwide citation)

A method and system for locating and positioning using broadcast frequency modulation (FM) signals, is provided. One implementation involves receiving FM stereo signals from three FM stations at one or more receivers, each stereo signal including a modulated 19 KHz FM pilot tone; and determining a g ...