Patents by Inventor John D. Williford

John D. Williford has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Automatic reference adaptation during dynamic signature verification
    Patent number: 4724542
    Abstract: A signature verification method wherein sets of reference signatures are automatically adapted to changing writing styles of a signer of a signature. More specifically, a number of signatures in a set of reference signatures are automatically replaced during a current verification session with signatures from the current verification session. In addition, signatures which would ordinarily be rejected using conventional methods of verification are compared with these new reference signatures which are indicative of current signing characteristics and then possibly accepted as true and valid signatures.
    Type: Grant
    Filed: January 22, 1986
    Date of Patent: February 9, 1988
    Assignee: International Business Machines Corporation
    Inventor: John D. Williford