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Wireless tracking system for personal items

  • US 20060135178A1
  • Filed: 12/21/2004
  • Published: 06/22/2006
  • Est. Priority Date: 12/21/2004
  • Status: Active Grant
First Claim
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1. A radio frequency transmission device comprising:

  • an electronic circuitry including a digital logic circuit and a radio transmission circuit;

    the digital logic circuit having a sleep mode of operation and an active mode of operation, the digital logic circuit alternate-able from the sleep mode to the active mode after a pre-determined time period;

    a digital signal generated by the digital logic circuit during the active mode of operation, the digital signal routed to the radio transmission circuit, the radio transmission circuit for transmitting a radio signal in a specific frequency range;

    the digital signal including a unique and predetermined sequence of fixed length pulses; and

    the electronic circuitry alternate-able into the sleep mode of operation immediately after transmission of the digital signal.

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