05675342 is referenced by 108 patents and cites 21 patents.

A method of identifying an object and determining in which of at least two areas the object is located is disclosed. The method includes the steps of: focusing a first directional antenna (18) on a first area (28a), focusing a second directional antenna on a second area (28b), transmitting a first field strength pulse (44) from said first directional antenna (18), transmitting a second field strength pulse (46) from said second directional antenna (18), and comparing in a transponder (14) the first field strength pulse (44) to the second field strength pulse (46) to determine in which of the two areas (28a,28b) the transponder (14) is located. Other devices, systems and methods are also disclosed.

Title
Automatic vehicle identification system capable of vehicle lane discrimination
Application Number
21123
Publication Number
5675342
Application Date
May 30, 1995
Publication Date
October 7, 1997
Inventor
Claude Andrew Sharpe
McKinney
TX, US
Agent
Jay M Cantor
Richard A Donaldson
Rebecca A Mapstone
Assignee
Texas Instruments Incorporated
TX, US
IPC
G01S 13/76
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