Scaffolding system
CA 1265830 C · Owner: Wah, Wong · Inventors: Wah, Wong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ledger system for scaffolding which comprises a tubular ledger member having an end plate at one or both ends and being provided at one or both ends with a first slot extending from the end plate parallel with the axis of the tubular ledger member and a second slot also extending from the end plate parallel with the axis of the tubular ledger member and located 180° round the circumference of the tubular ledger member from the first slot the second slot, having an enlarged inner end; and a wedge member for each pair of slots being arranged to pass through the first and second slots but being prevented from being removed from the first slot by first and second retaining means located …
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
- Granted February 13, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 13, 2007.
- 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.