Patents by Inventor Joseph F. Perret, Jr.

Joseph F. Perret, 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).

  • Illumination apparatus for a digitizer tablet with improved light panel
    Patent number: 5736686
    Abstract: An illumination apparatus for a digitizer tablet includes a support structure and a solid sheet optical light guide supported by the support structure and having first and second opposing surfaces and a plurality of edges. Light sources are carried by the support structure and positioned to direct light into light-receiving edges of the light guide. Reflecting structure is disposed adjacent the first surface of the light guide. A predetermined pattern is disposed on the first surface of the light guide structured and arranged in accordance with distance from the light sources.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: April 7, 1998
    Assignee: GTCO Corporation
    Inventors: Joseph F. Perret, Jr., Donald A. Ice, William J. Kautter