Patents by Inventor Clinton Barkhurst

Clinton Barkhurst 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).

  • Apparatus for demonstrating geometrical and gravitational relationships
    Patent number: 5238410
    Abstract: An apparatus for creating the illusion of a weighted body (10) rolling uphill on a diamond-shaped track (12) and demonstrating the geometrical relationship between the body and the track, includes a conically sectioned and tapered body (10) having plates (26, 28) disposed about its ends and a diamond-shaped track (12) having a pair of upwardly diverging spaced apart rails (50a, 50b) with apexes (20a, 20b) at their center portions and planar lower edges (38). The body (10), when disposed on the track (12), will roll unassisted towards the apex of the rails (50a, 50b) and continue to roll back and forth along the track (12) until coming to rest at the apexes (20a, 20b).
    Type: Grant
    Filed: July 17, 1992
    Date of Patent: August 24, 1993
    Inventor: Clinton Barkhurst