COMMUNICATION SYSTEM AND ALARM DEVICE
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United States of America Patent
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Issued Date -
Sep 2, 2010
app pub date -
Oct 9, 2008
filing date -
Oct 16, 2007
priority date (Note) -
Abandoned
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Abstract
A communication system provided with a plurality of communication devices which communicate with each other, wherein each of the communication devices includes: a storage device which stores a first code for identifying the communication device to the exclusion of others, and a second code defined so as to differ from other communication devices on the basis of the first code and a predetermined reference value; a transmission device which transmits a signal including the first code and the second code to the other communication devices; a reception device which receives the signals transmitted from the transmission devices of the other communication devices; and a control device which performs calculation using the first code and the second code included in the signal received by the reception device, and the first code stored in the storage device, and identifies the signal according to whether or not the value obtained by the above calculation matches with the second code stored in the storage device.
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