×

Identification devices and methods

  • US 4,445,712 A
  • Filed: 06/25/1982
  • Issued: 05/01/1984
  • Est. Priority Date: 01/14/1980
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of establishing the identity of an unknown client at a subscriber location comprising the steps of:

  • first, providing the client with a personal positional code consisting of a sequence of a plurality of letters of the alphabet, each of which locates a digit of a multi-digit number establishing the identity of the client;

    thereafter, at a subscriber location, presenting the client one of a multiplicity of different grids of digits in which each digit is positionally associated with a letter of the alphabet;

    obtaining a first response providing a pre-determined form of identification from the client;

    receiving from the client a second response consisting of a multi digit number from the grid as derived from his previously obtained personal positional code; and

    verifying the identity of the client by comparing the identification and number obtained from the client against a register.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×