Exercising apparatus
CA 2078226 C · Owner: Thornton, John Charles · Inventors: Thornton, John Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided exercising apparatus having an elongate frame (10) housing a longitudinal hydraulic main cylinder (13) one end of which is fixedly mounted , relative to a mounting end (11) of the frame, sealing means (20) being provided at the other end of, the main cylinder (13) through which a plunger rod (15) is sealably slidable handle means, (21) being associated with that end of the plunger rod (15) which is external. There is pro-, vided a main piston (18) at the inner end of the plunger rod (15) to define two opposite, sides of the main cylinder (13) the latter having adjustable aperture means (l6, 17) inter-, connecting said two sides for adjustably varying the permitted flow …
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 March 22, 1991 and granted May 14, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 22, 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.