Frp golf club shaft
CA 2363756 A1 · Owner: Ashida, Hiroki · Inventors: Ashida, Hiroki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A golf club has a shaft made of fiber reinforced plastics. The shaft has braided layers with substantially symmetrical diagonal yarns which are positioned at orientation angles +.theta. -.theta. from more than 0° to +10° and, from less than -0° to -10° respectively and/or from 45°, to less than +90° and from -45° to more than -90° respectively, against the longitudinal axis of the shaft at at least a portion along the longitudinal direction of the shaft. The Poisson's ratio v expressed by the ratio of lateral strain to longitudinal strain is 0.5 or less at least at the portion when load is applied to the shaft. The portion with the Poisson's ratio of 0.5 or less is preferably on the grip …
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
- Filed November 23, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 23, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 23, 2023.
- 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.