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Method and system for preventing parallel marketing of wholesale and retail items

  • US 6,817,538 B2
  • Filed: 05/20/2002
  • Issued: 11/16/2004
  • Est. Priority Date: 10/29/1998
  • Status: Expired due to Fees
First Claim
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1. A method, comprising:

  • scribing a code onto an item;

    applying a coating to said item, said coating including at least one rare earth element, wherein an index of refraction of said coating is substantially the same as that of said item, and said coating covers said code, wherein said code cannot be substantially viewed under ordinary visible light conditions; and

    assigning said code to a merchant.

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