Gripping screw drive bit
CA 2015056 C · Owner: A.T. & G. Company, Inc. · Inventors: Bonner, Ben V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gripping screw drive bit for use with conventional drive sockets which utilize non-magnetic means for gripping and retaining Robertson, TORX, and hexagonal screws and bolts. The gripping bit comprises two mating members. The gripping action is provided by the misalignment of the two members of a composite gripping bit, within a screw head recess, when a minimal amount of torque is exerted upon the composite gripping bit by a drive socket.
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 20, 1990 and granted September 21, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 20, 2012.
- 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.