Dynamic barbell
CA 2028615 A1 · Owner: Kanezaki, Kiyoshi · Inventors: Kanezaki, Kiyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In excersizing to enhance muscle strength of the upper body, especially the arms and shoulders. It is well known to use hand held barbells. In this invention unlike, conventional solid barbell, if it is held in hand and moved rapidly in horizontal reciprocating motion it will, increase the force against the direction of the movement of the barbell. Effectively it wil require more muscle power to move in reciprocating motion.
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 October 26, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2012.
- 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.