Dental handpiece construction
CA 1267306 C · Owner: Cowell, Mark · Inventors: Lares, Joseph P.; Cowell, Mark
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dental handpiece grips a removable dental tool by teeth within the end of a resilient quill carried within the spindle of said handpiece and when rotated in one direction by the handpiece turbine providing an axial force on the dental tool tending to draw the tool axialy into the quill despite any opposite pull due to teeth on the dental tool.
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 April 3, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 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.