An improved shaft for billiard cue
CA 2427979 A1 · Owner: Chang, Jung-Shih · Inventors: Chang, Jung-Shih
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A shaft of a billiard cue has an elongated skeleton having a core and one or more ribs transversely projecting from the core and a shaft body having an axial, receiving space which is complementable to said skeleton for receiving said skeleton, therein. The shaft body of the shaft is preferably formed by two or more wooden, sections compassing the skeleton therebetween.
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 May 6, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 6, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 2025.
- 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.