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Merchandise-Integral Transaction Receipt and Auditable Product Ownership Trail

  • US 20120197804A1
  • Filed: 04/08/2012
  • Published: 08/02/2012
  • Est. Priority Date: 11/21/2003
  • Status: Active Grant
First Claim
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1. A computer-implemented method of providing a product-integral transaction receipt, comprising:

  • computing, for each transfer of the product, a cryptographic signature over fields describing the transfer, the fields comprising at least a non-changeable globally-unique identifier computed to represent the transfer;

    for each transfer of the product, permanently recording the cryptographic signature and at least a portion of the fields describing the transfer on the product in a memory of a product-integral device, the portion comprising at least the non-changeable globally-unique identifier; and

    recording, for each transfer of the product, a copy of the cryptographic signature and the fields in a separate repository.

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