Patents by Inventor Stephen A. Hartford

Stephen A. Hartford 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).

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    Patent number: D418121
    Type: Grant
    Filed: August 5, 1998
    Date of Patent: December 28, 1999
    Assignee: Play, Inc.
    Inventors: Stephen A. Hartford, Daniel A. Kaye, J. Paul Montgomery, Michael Richard Young Moore, Mark R. Mooneyham, Stephan M. Bouchard, James D. Kimball, Karl V. Miller, Jeremy D. Wheaton, Michael P. Radogna, Peter A. Tjeerdsma