Patents by Inventor John R. Spirk

John R. Spirk 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).

  • Stacking toy or the like
    Patent number: D291583
    Type: Grant
    Filed: August 1, 1985
    Date of Patent: August 25, 1987
    Assignee: Dart Industries Inc.
    Inventors: Robert F. Bateman, Rino Conti, John R. Nottingham, John R. Spirk