Screwdriver
CA 1089261 A · Owner: Cournoyer, Roger · Inventors: Cournoyer, Roger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A screwdriver comprising a shank a conventional screw, driving head projecting from one end of the shank and in alignment therewith and characterized by an auxiliary screw driving head including a pair of auxiliary screw driving bits projecting from opposite sides respectively relative to the shank and angularly arranged relative to each other whereby a screw with a limited overhead space may be screwed by alternative engagement of the auxiliary screw driving bits with the head of the screw and progressive complementary rotation of the auxiliary bits. The latter are angularly arranged at different angles re1ative to the shank each as seen in front view. Thus for slotted head screw the …
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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 November 11, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 11, 1997.
- 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.