Patents by Inventor Kenneth I. Chan

Kenneth I. Chan 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).

  • Media discriminating and media presence sensor
    Patent number: 5139339
    Abstract: A media discriminating and presence sensor that can detect and discriminate between paper and transparency uses a light emitting diode and two defectors configured so as to measure both diffuse and specular reflectivity of the media, and a media support surface that suppresses unwanted reflections.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: August 18, 1992
    Assignee: Xerox Corporation
    Inventors: John E. Courtney, Fred F. Hubble, III., Kenneth I. Chan