Patents by Inventor Frank Greene

Frank Greene 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).

  • Resilient footwear heel
    Patent number: 4067125
    Abstract: A shoe heel made from a resilient material includes an interior cavity. Two magnetic plates of like polarity are embedded in opposed relationship within the interior cavity. The repulsive force between the magnetic plates cushions the act of walking and provides uniform support over the surface of the heel.
    Type: Grant
    Filed: March 7, 1977
    Date of Patent: January 10, 1978
    Inventor: Hilliard Frank Greene, Sr.
  • Sobriety tester
    Patent number: D333441
    Type: Grant
    Filed: January 9, 1990
    Date of Patent: February 23, 1993
    Inventor: Frank Greene