Expired Canadian patentCanada
Electric fire alarm system
CA 59415 A · Owner: Gould, John Duncklee · Inventors: Gould, John Duncklee; Tisdale, Charles Darwin
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 March 24, 1898. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 1915.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 2, 1897
GrantedMarch 24, 1898
Term endedMarch 24, 1915
Patent numberCA 59415 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.