Patents by Inventor David R. Hilgeman

David R. Hilgeman 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).

  • Candlestick
    Patent number: D253794
    Type: Grant
    Filed: April 7, 1978
    Date of Patent: December 25, 1979
    Inventor: David R. Hilgeman
  • Candlestick
    Patent number: D253795
    Type: Grant
    Filed: April 10, 1978
    Date of Patent: December 25, 1979
    Inventor: David R. Hilgeman