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Transaction card

DC
  • US 6,581,839 B1
  • Filed: 09/01/2000
  • Issued: 06/24/2003
  • Est. Priority Date: 09/07/1999
  • Status: Expired due to Term
First Claim
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1. A card comprising:

  • at least one of a translucent and transparent card surface; and

    a machine recognizable compound containing an infrared blocking material associated with and substantially covering said surface, whereby said card is capable of blocking infra red light at substantially all points on said surface when said card is inserted in a card reading machine.

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