Patents by Inventor Martin P. Stolpmann

Martin P. Stolpmann 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).

  • Convertible play vehicle
    Patent number: D466560
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: December 3, 2002
    Inventor: Martin P. Stolpmann