Patents by Inventor Robert Bilderback

Robert Bilderback 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).

  • Method and apparatus for manufacturing tamper-resistant identification cards
    Patent number: 5157424
    Abstract: An identification card for an individual contains textual data regarding the individual, a reproduction of the individual's signature and a photograph of the individual. The photograph has superimposed thereon a duplicate of the individual's signature as it appears elsewhere on the card. Through this modification of the photograph on the card with information that appears elsewhere, an unauthorized user is inhibited from tampering with the card by substituting one photograph for another.
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: October 20, 1992
    Assignee: NBS Imaging Systems, Inc.
    Inventors: Jack Craven, Robert Bilderback