Patents by Inventor David S. Griffith

David S. Griffith 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).

  • Warning light
    Patent number: 4621253
    Abstract: A hazard warning light for attachment to a vehicle is designed to give the illusion of a rotating lamp of high intensity and is actuable by the driver of one vehicle to alert following cars to the existence of an emergency e.g. a car crash. The light incorporates electronic circuitry.
    Type: Grant
    Filed: March 7, 1983
    Date of Patent: November 4, 1986
    Assignee: Rotalight Limited
    Inventors: Keith J. Pillinger, David S. Griffith