Patents by Inventor John F. Thorn

John F. Thorn 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).

  • Door assembly
    Patent number: 4901493
    Abstract: An improved door assembly having compression molded frame skins defining a central opening, compression molded panel skins in said central opening and a unitary foam core for the panel and the frame is provided. The frame skins and panel skins define cavities which communicate with each other. The panel skins may occupy all or only a portion of the central opening and may be formed in a number of different configurations.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: February 20, 1990
    Assignee: Therma-Tru Corp.
    Inventor: John F. Thorn