Patents by Inventor Ed L. Sonderman

Ed L. Sonderman 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).

  • Scan-controlled keyboard
    Patent number: 4277780
    Abstract: A keyboard having a matrix arrangement of analog keyswitches arranged along column conductors leading from a driver chip and row conductors leading to a detector chip. The driver chip has a strobe line and multiple address lines adapted to connect to a controller. The column conductors are sequentially pulsed by the driver chip. The detector chip has a strobe line common to that of the driver chip and a multiple line data bus for directing keyboard signals simultaneously from the several row columns.
    Type: Grant
    Filed: February 15, 1980
    Date of Patent: July 7, 1981
    Assignee: Key Tronic Corporation
    Inventors: Ed L. Sonderman, Walter Z. Davis