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Expired Canadian patentCanada

Stamp canceller

CA 100733 A · Owner: Bowercock, Wilber E. · Inventors: Bowercock, Wilber E.

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 28, 1906. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 28, 1923.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 23, 1906
GrantedAugust 28, 1906
Term endedAugust 28, 1923
Patent numberCA 100733 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190719091911191319151917191919211923Application filedJune 23, 1906Patent grantedAug 28, 1906Term endedAug 28, 1923

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.