Communication system
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United States of America Patent
Stats
-
Mar 25, 2003
Grant Date -
Jun 7, 2001
app pub date -
Sep 19, 1997
filing date -
Sep 20, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A communication system capable of preventing a lost transmitter from being used by an unauthorized user for a bad purpose, and also capable of easily enabling the lost transmitter to be used again when it is found. The communication system comprises: a transmitter for transmitting a transmission code containing at least an identification code uniquely assigned to the transmitter; and a receiver comprising: an identification code memory capable of storing a received identification code; a signal processing unit which compares the received identification code with an identification code stored in the identification code memory and outputs a control signal to a part to be controlled if the comparison shows that both the identification codes are identical to each other; and a mode controller for switching the operation mode of the signal processing unit from a normal mode to a control signal disable mode wherein in the normal mode the control signal is allowed to be output whereas the control signal is prohibited to be output in the control signal disable mode.
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