Patents by Inventor Robert B. Duffey

Robert B. Duffey 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).

  • Tire uniformity machine
    Patent number: 4458451
    Abstract: A tire uniformity machine where grinding is effected through electronics which compare the electrical output signals of tire variation sensor means to a percentage of the peak to peak variations of the signals.
    Type: Grant
    Filed: December 31, 1981
    Date of Patent: July 10, 1984
    Assignee: The B. F. Goodrich Company
    Inventors: Clarence L. Rogers, Robert B. Duffey