A crane assembly
CA 2485303 A1 · Owner: Mckay, Douglas Mcgregor · Inventors: Mckay, Douglas Mcgregor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lifting assembly comprising parallel guides (18 20), a carriage (26, 28) , associated with each parallel guide (18 20) and movable along the length of , the parallel guides a displacement arm (40) pivotally connected to each carriage (26, 28) and pivotally supporting a bridge (14) preferably a trolley , (13) located on the bridge (14) including attachment means (12) for supporting a lifting device.
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 30, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 30, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 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.