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Anthony C Fascenda, Daniel L Gregg, Rollin W Ache: System for identifying and displaying data transmitted by way of unique identifying frequencies from multiple vehicles. Dataspeed, Flehr Hohbach Test Albritton & Herbert, May 15, 1984: US04449114 (124 worldwide citation)

A system for detecting the location and identification of a number of vehicles at multiple points on a given track against a time gauge which includes an on-board transmitter on each vehicle of a unique identifying frequency, spaced receiving circuit elements along the track at multiple points conne ...


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METHOD FOR LOCATING THE POSITION OF A VEHICLE. DATASPEED, November 13, 2014: US20140333481-A1

A method for locating the position of a vehicle having a transceiver. An estimate of the position of the vehicle is first determined by using at least three spaced apart receivers by performing trilateration with the three receivers. Thereafter, two of the receivers which intersect the vehicle at an ...