Patents by Inventor James Eugene Duncan

James Eugene Duncan 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).

  • Dynamic variable resistance balance board
    Patent number: 6019712
    Abstract: A balancing apparatus includes a platform that tilts upon a hemisphere attached to the lower surface thereof. The platform has a grooved track along its periphery. The outermost wall of the track is inclined. A ball is movable around said track upon tilting of the platform and can climb the outermost wall of the track when moved at a fast speed. The ball adds resistance to the tilting of the platform.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: February 1, 2000
    Inventor: James Eugene Duncan