Patents by Inventor Dudley Bruce Johnson

Dudley Bruce 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).

  • Keyboard switch with printed wiring board structure and its method of manufacture
    Patent number: 4046981
    Abstract: A printed wiring board comprised of a plurality of keys or switches, which form a keyboard, for entry of data or changing the function of an electrical circuit. Each key comprises a flexible conductive actuating element and at least two conductive contacts which are affixed in a nonplanar relationship to the substrate of a printed wiring board. The actuating element is caused to come in contact with the conductive contacts when the actuating element is depressed, thus closing the switch.
    Type: Grant
    Filed: December 24, 1975
    Date of Patent: September 6, 1977
    Assignee: Texas Instruments Incorporated
    Inventors: Dudley Bruce Johnson, Stephen Leroy Hanni