Expired Canadian patentCanada
Multi-bit screwdriver
CA 2735346 C · Owner: Dragonfire Group Holdings Limited · Inventors: Beauchamp, Fern
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-bit driver is provided wherein each bit assembly has a tool bit and a bit extension. The bit extension is interposed between said tool bit and a forward facing abutment surface when in the extended in-use configuration
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 April 19, 2004 and granted April 24, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 19, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 19, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 19, 2004
GrantedApril 24, 2012
Term endedApril 19, 2024
Patent numberCA 2735346 C
Classification (IPC)B25G1/08 +1 more
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.