×

Method and apparatus for fingerprinting and authenticating various magnetic media

  • US 5,546,462 A
  • Filed: 09/09/1994
  • Issued: 08/13/1996
  • Est. Priority Date: 04/09/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. A device for fingerprinting an object for the later determination of its identity, said object including at least in part, a non-recording magnetic medium portion, said device having means for determining a remanent noise for said non-recording magnetic medium portion, said remanent noise comprising the fingerprint for said object, and means for recording said remanent noise for later comparison with the later determination of said remanent noise to thereby identify said object.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×