Golf club head with audible vibration attenuation
CA 2128569 C · Owner: Callaway Golf Company · Inventors: Helmstetter, Richard C.; Schmidt, Glenn H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A golf club head having a body defining a heel toe, top wall, sole defining a bottom wall and a front, wall defining an upwardly and rearwardly inclined front face, and comprising the body defining a forwardly extending main recess located rearwardly of the front wall; and the body also defining an undercut recess located directly rearwardly of the front wall and extending outwardly from the main recess toward one or more of the following:, i) the top wall ii) the bottom wall, iii) the toe, iv) the heel: and structure on said front wall and located forwardly of the main recess for attenuating audible vibration created when a golf ball is struck by the front face.
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 July 21, 1994 and granted May 25, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 21, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 21, 2016.
- 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.