Patents by Inventor James R. Dupzyk

James R. Dupzyk 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).

  • Simulative stilt
    Patent number: D255468
    Type: Grant
    Filed: June 24, 1977
    Date of Patent: June 17, 1980
    Assignee: Frantic Feet Toy, Company
    Inventors: Robert Ricca, Frank Ricca, James R. Dupzyk