Miracle curb climber
CA 2366481 A1 · Owner: Wu, Donald P.H. · Inventors: Wu, Donald P.H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A miracle curb climber includes a casing having a top connecting bolt for screwing to a front or a rear axle of a walking aid such as a handcart, a wheelchair, an electric wheelchair a wheeled power chair, etc. at least, one front pilot wheel and at least one main land-contacting wheel mounted into front and rear end of the casing respectively, and at least, one relaying wheel mounted in the casing between the pilot wheel and the land-contacting wheel. The front pilot wheel and the relaying wheel have diameters smaller than that of the main land-contacting wheel and are suspended in the air in front of the main land-contacting wheel enabling the main land-contacting wheel to smoothly climb …
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 January 2, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 2, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 2, 2024.
- 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.