Patents by Inventor Ronald Hellenthal

Ronald Hellenthal 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).

  • Combined toy vehicle and steering device therefor
    Patent number: D261017
    Type: Grant
    Filed: February 10, 1978
    Date of Patent: September 29, 1981
    Assignee: Louis Marx & Co., Inc.
    Inventors: John Birdsall, Edward B. Bretschger, Fred Adickes, Ronald Hellenthal