Security and communication system with location detection
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United States of America Patent
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Jun 29, 1993
Grant Date -
N/A
app pub date -
Jan 17, 1992
filing date -
Jan 17, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved security and communication system accurately and quickly locates the position of a signaling portable radio frequency transmitter. When a portable transmitter is activated, a first signal, including identification information, is emitted. The first signal is received by any of a number of radio frequency relays, the signal is manipulated and transmitted to a central processing station as a second signal. The central processing station can, by using the second signals received, either from one or a number of relay stations, determine which relay station is closest to the portable transmitter.
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