Patents by Inventor Quentin Leef

Quentin Leef 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).

  • Fraud prevention method and system
    Patent number: 6106020
    Abstract: A method for preventing fraudulent use of a document which is intended to be used by a designated individual, by the steps of, digitally photographing the face of an individual who has possession of the document to form a digital representation of the face; processing the digital representation to generate digital printer input data; and printing a visually observable image of the face of the individual on the document, using the digital printer input data.
    Type: Grant
    Filed: October 28, 1997
    Date of Patent: August 22, 2000
    Assignee: Kerning Data Systems, Inc.
    Inventors: Quentin Leef, John Reed