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Expired Canadian patentCanada

Train controlling system

CA 179263 A · Owner: Howe, Winthrop Keith · Inventors: Howe, Winthrop Keith

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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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.

Google PatentsCIPO record

Why it's free to use

  • Granted September 11, 1917. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 11, 1934.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 11, 1915
GrantedSeptember 11, 1917
Term endedSeptember 11, 1934
Patent numberCA 179263 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

1916191819201922192419261928193019321934Application filedFeb 11, 1915Patent grantedSep 11, 1917Term endedSep 11, 1934

Sources & verification

Official CIPO records

Canadian Patents DatabaseClaims, description, documents and status.CIPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.com

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.