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Radio frequency identification devices, remote communication devices, identification systems, communication methods, and identification methods

  • US 8,487,766 B2
  • Filed: 08/27/2012
  • Issued: 07/16/2013
  • Est. Priority Date: 07/29/1999
  • Status: Expired due to Fees
First Claim
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1. A radio frequency device configured to provide an indication relating to the location of an object disposed at a first location, the radio frequency device comprising:

  • apparatus configured to receive from a radio frequency communications device a first radio frequency signal;

    apparatus configured to transmit a second radio frequency signal in response to receipt of the first radio frequency signal; and

    apparatus configured to provide an indication associated with the first location, said indication being representative of the proximity of the radio frequency device to the radio frequency communications device.

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