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Wireless transponder for a security system

  • US 7,616,092 B2
  • Filed: 05/11/2004
  • Issued: 11/10/2009
  • Est. Priority Date: 05/11/2004
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a first receiver configured to receive a reply signal at a first frequency from a marker positioned remotely from said receiver, and within an interrogation zone for an electronic article surveillance system, and said first receiver to convert said reply signal to a second frequency;

    a first transmitter to connect to said receiver, said first transmitter to transmit said reply signal at said second frequency; and

    a second receiver configured to receive said reply signal at said second frequency, said second receiver to convert said reply signal from said second frequency to said first frequency, and send said reply signal to a controller.

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