Patents by Inventor Henry W. Helmer

Henry W. Helmer 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).

  • Pallet
    Patent number: D279418
    Type: Grant
    Filed: January 10, 1983
    Date of Patent: June 25, 1985
    Inventor: Henry W. Helmer
  • Pallet
    Patent number: D279617
    Type: Grant
    Filed: January 10, 1983
    Date of Patent: July 9, 1985
    Inventor: Henry W. Helmer