Patents by Inventor Hal W. Stephenson

Hal W. Stephenson 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).

  • Irish fireplace peat block
    Patent number: D298027
    Type: Grant
    Filed: September 20, 1985
    Date of Patent: October 11, 1988
    Inventor: Hal W. Stephenson