Patents by Inventor Glenn R. Andersen

Glenn R. Andersen 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).

  • Patent number: 4257604
    Abstract: A play feature for a pinball machine is described comprising a plurality of drop targets that are preferably located in-line along a confined lane of a pinball playfield, each of the drop targets extending through an opening in the playfield and being movable between an up and a down position. The play feature further comprises means for releasably maintaining each of the drop targets in the up position until struck by a ball propelled up the lane, resetting means for simultaneously raising the drop targets from the down position to the up position, and driving means for driving the resetting means in response to an electric signal being applied thereto.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: March 24, 1981
    Assignee: Bally Manufacturing Corporation
    Inventors: Irwin J. Grabel, Glenn R. Andersen