Iron golf club
CA 2362843 A1 · Owner: Iwata, Mototaka · Inventors: Iwata, Mototaka; Masuda, Naoyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An iron golf club, comprising a head part (1) having a face surface (4) wherein a coefficient of restitution obtained when a ball is hit by a sweet spot on the face surface (4) at a speed of 44 m/s falls within the range of 0.81 or more to 0.95 or less, the effective face area of the head part (1) is 2500 mm?2~ or larger to 5000 mm?2~ or smaller the effective deflection length , is 36 mm or longer to 72 mm or shorter and the face thickness at the sweep , spot is 1.0 mm or thicker to 2.5 mm or thinner.
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 January 11, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 11, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 11, 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.