Walking aid
CA 2429274 A1 · Owner: Mcgrath, Thomas Francis · Inventors: Mcgrath, Thomas Francis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Walking aid apparatus comprises handle portion and a shaft portion including a ground-contacting ferrule, the shaft portion comprising telescopically-mounted cylindrical spindle (13) and sleeve elements (14) and a spring means acting between seats of said spindle and sleeve elements resiliently (26) to restrain relative axial sliding movement, in which the apparatus includes a sliding friction-reducing means (28,29) between at least one end of the spring means and the associated seat, whereby the handle portion and the ferrule are axially rotatable to accommodate twisting movement as between the user and the ground in use. The sliding friction-reducing means results in controlled …
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 November 6, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 6, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 2023.
- 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.