Emergency vehicle detector
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United States of America Patent
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-
Sep 24, 1996
Issued Date -
N/A
app pub date -
Aug 10, 1994
filing date -
Aug 10, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
An emergency vehicle contains a transmitter for generating and transmitting a pair of fixed continuous wave signals which are distinguishable from each other in a preselected frequency band. A passenger vehicle contains a receiver which detects and distinguishes the pair of signals and generates an alert if the signals are determined to be at predetermined frequencies.
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