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Expired Canadian patentCanada

Railway car gear

CA 83034 A · Owner: Townsend, Frederick B. · Inventors: Townsend, Frederick B.

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 August 20, 1903. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 20, 1920.
  • 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 20, 1903
GrantedAugust 20, 1903
Term endedAugust 20, 1920
Patent numberCA 83034 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190419061908191019121914191619181920Application filedAug 20, 1903Patent grantedAug 20, 1903Term endedAug 20, 1920

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.