Expired Canadian patentCanada
Setting device to be operated by means of keys, destined for an adding or calculating machine, a cash-register or suchlike device
CA 757487 A · Owner: Frans W. Ruijs · Inventors: Frans W. Ruijs
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 April 25, 1967. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 25, 1984.
- 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—
GrantedApril 25, 1967
Term endedApril 25, 1984
Patent numberCA 757487 A
Classification (IPC)G06C7/02
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.