Expired Canadian patentCanada
Track adjusting machine
CA 197357 A · Owner: John Knutsen · Inventors: Charles Louttit; John Knutsen
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 February 17, 1920. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 17, 1937.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedFebruary 17, 1920
Term endedFebruary 17, 1937
Patent numberCA 197357 A
Classification (IPC)E01B27/17 +1 more
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.