Patents by Inventor Dennis K. Hoffman

Dennis K. Hoffman 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).

  • Bird feeder
    Patent number: 5655477
    Abstract: A bird feeder is constructed of two tubular containers attached end-to-end by a coupler threaded at opposite ends. A feed flow mechanism extends through the coupler and into both containers. Feed gravitationally flowing through the feed flow mechanism accumulates in a feed trough at the base of the lower tubular container. The amount of feed accumulating in the trough is controlled by the feed flow mechanism.
    Type: Grant
    Filed: September 12, 1995
    Date of Patent: August 12, 1997
    Assignee: Two Sisters & Their Dad
    Inventors: Esther R. Hoffman, Annemarie E. Hoffman, Dennis K. Hoffman