Patents by Inventor Dennis W. Higdon

Dennis W. Higdon 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).

  • Drag race reaction timer
    Patent number: 4456383
    Abstract: A drag race reaction timer including a displacement measuring means comprising a roller contained within a housing and a switch operable upon contact with said roller. Circuitry is provided to activate yellow and green lamps simulating the start of a drag race and to determine the time difference between the appearance of the green lamp and displacement of the auto by a predetermined distance. If the auto moves the predetermined distance before the appearance of the green light, a red light is activated.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: June 26, 1984
    Inventors: Frank H. Speckhart, Dennis W. Higdon