Roadway antennae
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 9, 1993
Issued Date -
N/A
app pub date -
Mar 8, 1991
filing date -
Feb 13, 1981
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Antennas designed for use in producing effective electromagnetic capture zones for transponders mounted on moving vehicles. The antenna systems disclosed are principally designed to be mounted at or near the surface of a roadway carrying the vehicle whose transponder is to be interrogated. A principal advantage of the antennas of the invention is minimal interference with normal operation of the road and greatly reduced cost of installation when used in providing vehicle identification, toll collection, or communication with the transponder carrying vehicle.
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Family
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Cited Art Landscape
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