Patents by Inventor Earl R. Strandt

Earl R. Strandt 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 encoding circuit utilizing an A/D converter
    Patent number: 4015254
    Abstract: Various switches of a keyboard are connected with a voltage divider network to establish an analog voltage for respective switch closures. The analog voltage is stored on a capacitor and converted by an analog-to-digital converter for input to a computer.
    Type: Grant
    Filed: December 4, 1975
    Date of Patent: March 29, 1977
    Assignee: General Motors Corporation
    Inventor: Earl R. Strandt