Golf ball
CA 2040205 C · Owner: Oka, Kengo · Inventors: Yabuki, Yoshikazu; Oka, Kengo; Maruoka, Kiyoto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a golf ball having one great circle and four one-half great circles intersecting no dimples in which eight end points including of two end points of each one-half great circle do not coincide with each other on said great circle one of said, one-half great circles intersecting the other one-half great circle at a right angle at the middle point thereof on each side of said great circle.
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 April 10, 1991 and granted December 13, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 10, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2013.
- 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.