Patents by Inventor F. John Roost

F. John Roost 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).

  • Portable mixer
    Patent number: D256800
    Type: Grant
    Filed: August 21, 1978
    Date of Patent: September 9, 1980
    Assignee: American Equipment Corporation
    Inventors: Darrel B. Deen, Lawrence L. Walsted, F. John Roost