Patents by Inventor Harry E. Franks

Harry E. Franks 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).

  • Spark plug
    Patent number: 3958144
    Abstract: Spark plugs having electrodes formed from combinations in defined proportions of tungsten, vanadium, depleted uranium, rhodium, iridium, palladium, nickel, chromium, copper, barium aluminate, iron, and thoria. Various advantageous electrode configurations are described, as well as methods of constructing the spark plugs.
    Type: Grant
    Filed: November 22, 1974
    Date of Patent: May 18, 1976
    Inventor: Harry E. Franks