Patents by Inventor Francis A. Braden

Francis A. Braden 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).

  • Heat economizer
    Patent number: 4919245
    Abstract: A heat economizing device comprises a perforated container filled with heat exchange material for supported retention within a heating duct or hot air carrying wall space.
    Type: Grant
    Filed: June 19, 1989
    Date of Patent: April 24, 1990
    Inventor: Francis A. Braden