Patents by Inventor William Hannapel

William Hannapel 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).

  • Pop screen filter assembly
    Patent number: D525238
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: July 18, 2006
    Assignee: Stedman Corporation
    Inventor: William Hannapel