Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2007-04-10
2007-04-10
Wu, Daniel (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S010100, C340S541000, C340S572800, C340S005920, C340S870030
Reexamination Certificate
active
10869157
ABSTRACT:
Systems and techniques for identifying the presence of a jamming signal impairing the operation of an RFID reader. An RFID reader includes a signal strength detector that detects and measures the signal strength of signals within a prescribed frequency range typical of that used by RFID devices. If a signal within the frequency range and exceeding a predetermined maximum strength is detected, the reader identifies the presence of a jamming signal impairing the proper operation of the reader. The reader takes appropriate action upon identification of a jamming signal, for example issuing a local alert or alarm, or sending a message to a central security station, which may then take appropriate action in response to the message, such as alerting appropriate personnel, sounding alarms or securing exits.
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NCR Corporation
Previl Daniel
Priest & Goldstein PLLC
Wu Daniel
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