Secure entry system with radio communications
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United States of America Patent
Stats
-
Jun 6, 2000
Grant Date -
N/A
app pub date -
Jan 9, 1992
filing date -
Jan 9, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A secure entry system makes use of radio transmissions to communicate with locks, keys, and related components throughout the system. The radio transmissions can be made using a paging system, a cellular telephone system, or any other RF carrier. Some embodiments employ a cellular telephone in lieu of an electronic key. Others integrate a paging receiver within an electronic key to provide a unit with dual functionality. The system is illustrated with reference to exemplary applications in the industrial site security, real estate lockbox, and transportation fields.
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