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Radio and optical identification tags

  • US 20050040241A1
  • Filed: 08/19/2003
  • Published: 02/24/2005
  • Est. Priority Date: 08/19/2003
  • Status: Active Grant
First Claim
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1. An identification tag in a form of a single microcircuit, comprising:

  • an optical transceiver;

    a radio transceiver;

    a memory storing an identification code connected to the optical transceiver and the radio transceiver;

    means for operating at least one of the transceivers in receive mode while operating at least one of the transceivers in transmit mode; and

    means for transmitting the identification code by the transceiver operating in the transmit mode in response to receiving a predetermined signal by the transceiver operating in the receive mode.

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