Patents by Inventor John Henry Heim

John Henry Heim 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).

  • Element of flexible toy track
    Patent number: D250056
    Type: Grant
    Filed: January 3, 1977
    Date of Patent: October 24, 1978
    Assignee: Hasbro Development Corp.
    Inventor: John Henry Heim