Patents by Inventor John R. Harbour

John R. Harbour 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).

  • Electrophoretic display device
    Patent number: 4272596
    Abstract: An electrophoretic display device which provides high contrast images and a stable suspending fluid is described. A white marking material such as titanium dioxide is suspended in a colloidal dispersion containing black colorant such as colloidal size iron oxide particles known as ferrofluids. Image formation is achieved electrophoretically by selective application of an electric field across the imaging suspension.
    Type: Grant
    Filed: June 1, 1979
    Date of Patent: June 9, 1981
    Assignee: Xerox Corporation
    Inventors: John R. Harbour, Michael L. Hair