Patents by Inventor Roger Washburn

Roger Washburn 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).

  • Weighted cups
    Publication number: 20040029089
    Abstract: The present invention describes set of weighted practice cups for training for cup stacking competitions as well as the production of the cups and methods of training using the cups.
    Type: Application
    Filed: August 9, 2002
    Publication date: February 12, 2004
    Applicant: Speed Stacks, Inc.
    Inventors: John L. Goers, Roger Washburn