Expired Canadian patentCanada
Control mechanism for friction drive gears
CA 127635 A · Owner: Darby, Clifford T. · Inventors: Darby, Clifford T.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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 August 23, 1910. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 23, 1927.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 22, 1910
GrantedAugust 23, 1910
Term endedAugust 23, 1927
Patent numberCA 127635 A
Classification (IPC)—
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.