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Monitoring method

  • US 20030146836A1
  • Filed: 12/02/2002
  • Published: 08/07/2003
  • Est. Priority Date: 05/24/2000
  • Status: Active Grant
First Claim
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1. A method for tracking environmental exposure of an object comprising selecting said object;

  • associating a radiofrequency identifier with the object, the radiofrequency identifier comprising an antenna for transmitting or receiving radiofrequency energy; and

    an integrated circuit chip connecting with said antenna, said chip having a memory;

    exposing the object to an environmental condition;

    measuring said environmental condition as an environmental parameter with a sensor physically separate from said radiofrequency identifier; and

    writing said environmental parameter to the memory of the chip by transmitting radiofrequency energy thereto.

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