Badminton racket
CA 1137132 A · Owner: Yonex Sports Kabushiki Kaisha · Inventors: Yoneyama, Minoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure In a badminton racket having a substantially T-shaped tubular joint adapted to connect a shaft to a frame, the joint is provided with a pair of ribs integrally formed on opposite outer surfaces thereof. Each rib extends from the central part of this outer surface to respective free end portions of the T-shaped joint in such a manner that the rib is formed substantially in the shape of "T" with the thickness and width thereof gradually reducing toward the free end portions of the Tshaped joint.
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 December 7, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 7, 1999.
- 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.