Patents by Inventor Bent N. Madsen

Bent N. Madsen 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).

  • Recycling bird seed feeder
    Patent number: 7654225
    Abstract: A bird feeder includes a housing containing a bird food hopper. The hopper feeds food into a tray. The tray is sandwiched between a roof and a floor, both of which extend outwardly from the tray to define a restricted vertical clearance duct for birds attempting access to the tray. Vertical partitions between the roof and floor define a restricted width clearance thereby forming a restricted clearance passageway to the tray between adjacent partitions and the corresponding roof and floor.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: February 2, 2010
    Inventors: Bent N. Madsen, Phil Veenhof