Surgical drill
CA 1301575 C · Owner: Bristol-Myers Squibb Company · Inventors: Shutt, George V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drill includes a plurality of lips with enlarged portions at one end defining heads therefore. The heads form frusto-conical surfaces and cutting edges extend from the frusto-conical surfaces to remove chips. The cutting edges are limited in size with respect to the frusto-conical surfaces to control the removal of chips and a pocket behind each head readily receives the shavings to convey the latter away from the one end.
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 May 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 2009.
- 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.