Patents by Inventor Frank J. Wilhelm

Frank J. Wilhelm 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).

  • Patent number: D247720
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: April 11, 1978
    Assignee: The Fluorocarbon Company
    Inventor: Frank J. Wilhelm