Patents by Inventor Robert Joseph Johnson

Robert Joseph Johnson 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).

  • Membrane-type touch panel
    Patent number: 4085302
    Abstract: A location sensitive touch panel for use on a rigid substrate. The substrate carries a first set of conductive strips. A resilient plastic membrane overlaying it carries a second set of conductive strips orthogonal to and spaced from the first set. Finger pressure can cause electrical contact between any one of the first set of strips and any one of the second set of strips. The substrate may be either flat or curved, with the membrane conforming to its contour.
    Type: Grant
    Filed: November 22, 1976
    Date of Patent: April 18, 1978
    Assignee: Control Data Corporation
    Inventors: George Edward Zenk, Robert Joseph Johnson, Charles Newell Miller