Patents by Inventor John M. Mitchell, Jr.

John M. Mitchell, Jr. 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).

  • Linear encoder for digital printing applications
    Patent number: 5184011
    Abstract: The invention comprises a sensor system in a printhead scanner which is capable of achieving accurate pixel to pixel registration. A plastic film strip with alternating fiducial bars and spaces is scanned. A voltage pattern is triggered by the zero slope points of the voltage induced by a sensing mechanism being moved along the plastic film strip.
    Type: Grant
    Filed: January 3, 1991
    Date of Patent: February 2, 1993
    Assignee: Xerox Corporation
    Inventors: Fred F. Hubble, III, John M. Mitchell, Jr., James P. Martin