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Security systems based on recording unique identifier for subsequent playback

  • US 5,247,497 A
  • Filed: 11/18/1991
  • Issued: 09/21/1993
  • Est. Priority Date: 11/18/1991
  • Status: Expired due to Term
First Claim
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1. A security system comprising:

  • means for recording specified information about a user each time the user uses the system, said specified information being supplied by the user each time the user uses the system, said specified information also being substantially unique to the user supplying that information; and

    means for automatically playing back to a user the specified information recorded about that same user during a preceding use of the system by that same user.

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