Tennis racket with convex throat
CA 1236136 A · Owner: Winkler, George C. · Inventors: Winkler, George C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
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.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 3, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 3, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.