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Label for concealing information

  • US 6,358,607 B1
  • Filed: 07/22/1999
  • Issued: 03/19/2002
  • Est. Priority Date: 07/22/1998
  • Status: Expired due to Term
First Claim
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1. A label for covering information comprising:

  • a base layer having opposed first and second surfaces;

    an adhesive layer attached to the first surface;

    an opaque scratch layer attached to the second surface, and an authentication mark attached to the scratch layer, wherein the scratch layer is irreversibly removable from the base layer and said base layer includes at least one sealed region on the surface remote from said scratch layer, said seal region incorporating a coating which, after the label has been secured to a medium, indicates in an irreversible manner that said base layer has been removed from the medium.

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