Patents by Inventor Frederick G. VanKoughnet

Frederick G. VanKoughnet 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).

  • Engraved surveyor's marker
    Patent number: D402908
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: December 22, 1998
    Inventors: James F. Machen, Frederick G. VanKoughnet