Patents by Inventor James Gordon Spencer

James Gordon Spencer 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).

  • Roller compactor machine
    Patent number: D865011
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: October 29, 2019
    Assignee: Freund-Vector Corporation
    Inventors: James Alan Clark, James Gordon Spencer, Jeffrey Edward Fehlhafer, Masaaki Kubota, Kyle Andrew Burlage