Patents by Inventor Robert R. C. Clements

Robert R. C. Clements 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).

  • Knotty problem plaque
    Patent number: D419482
    Type: Grant
    Filed: January 21, 1999
    Date of Patent: January 25, 2000
    Inventor: Robert R. C. Clements