Patents by Inventor William J. Upper

William J. Upper 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).

  • Hand exerciser
    Patent number: 5141478
    Abstract: A passive hand exercise device having first and second handles. The handles are opposed to one another and positioned to be engaged simultaneously by a hand to be exercised, which compresses and expands the handles against a passive resistance force applied against movement of the first handle relative to the second.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: August 25, 1992
    Inventor: William J. Upper