Patents by Inventor George C. Winkler

George C. Winkler 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).

  • Tennis racket with convex throat
    Patent number: 4662634
    Abstract: A tennis racket (2) is disclosed having a throat (6) with a pair of outer convex curved sides (8, 10) bowed away from each other and extending between a handle (4) and a head (12). A widened and lengthened sweet spot area (34) is provided on the face (14) of the racket by the widened bridge (20) at the base of the head and a flat inner periphery surface (24) opposite thereto at the head tip (22) together with opposing inner flat surfaces (30, 32) along the sides (26, 28) of the head.
    Type: Grant
    Filed: May 31, 1984
    Date of Patent: May 5, 1987
    Assignee: Chris Development Corporation
    Inventor: George C. Winkler