Patents by Inventor C. David Dean

C. David Dean 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).

  • Bi-directional torsion spring wrist hand and forearm exerciser
    Patent number: 6106438
    Abstract: A hand-held bidirectional torsion spring wrist, hand and forearm exercise device has a pair of handgrip members rotatably joined together to rotate relative to each other in opposed directions about a common longitudinal axis, each sized and shaped to be gripped by a separate hand of a user to impart rotation thereof. An elongate flat rectangular spring member is disposed in the center of the handgrip members and has opposed ends secured to each handgrip member, respectively, and has a longitudinal axis coaxial with the common axis of the handgrip members. The spring member is subjected to a twisting torque force along its longitudinal axis upon relative rotation of the handgrip members in opposed directions to produce a resistive force against relative rotation of the handgrip members in opposed directions.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: August 22, 2000
    Inventor: C. David Dean
  • Wrist, hand and forearm exerciser
    Patent number: D451564
    Type: Grant
    Filed: August 9, 2000
    Date of Patent: December 4, 2001
    Inventor: C. David Dean