Patents by Inventor Trevor J. Hastie

Trevor J. Hastie 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).

  • Patent number: 5111512
    Abstract: A method and apparatus are described for verifying handwritten, human signatures, and for permitting access to a system if such a signature is accepted. In an initializing stage, an authorized entrant submits a sample of multiple signatures. A first reference signature is selected from the sample, and a second reference signature is constructed by averaging over the sample. When a subsequent, prospective entrant submits a signature, a dynamic mismatch is calculated with respect to the first reference signature, and a shape mismatch is calculated with respect to the second reference signature. The signature is accepted if it satifies a predetermined criterion that refers to the dynamic and shape mismatch values.
    Type: Grant
    Filed: May 14, 1991
    Date of Patent: May 5, 1992
    Assignee: AT&T Bell Laboratories
    Inventors: Jason Chia-Sun Fan, Trevor J. Hastie, Eyal Kishon