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Methods and apparatus for authenticating data storage articles

  • US 5,548,106 A
  • Filed: 08/30/1994
  • Issued: 08/20/1996
  • Est. Priority Date: 08/30/1994
  • Status: Expired due to Term
First Claim
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1. A method for authenticating data storage cards for use in conjunction with existing card-reading means, comprising the steps of:

  • a) providing data storage cards bearing at least two sets of indicia includingfirst indicia that are invisible when irradiated with light in the visible spectrum but are detectable when irradiated with non-visible light andsecond indicia readable by said existing card-reading means,b) irradiating said data storage cards with said non-visible light,c) detecting said first indicia to determine the authenticity or lack thereof for each of said data storage cards, andd) optionally exposing each of said data storage cards to said existing card-reading means to read said second indicia.

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