Patents by Inventor William F. Ziegler

William F. Ziegler 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).

  • Ink dauber
    Patent number: D334399
    Type: Grant
    Filed: May 15, 1990
    Date of Patent: March 30, 1993
    Inventor: William F. Ziegler