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Expired Canadian patentCanada

Drawing instrument

CA 94226 A · Owner: Leonard, Joseph Thompson · Inventors: Leonard, Joseph Thompson

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 July 19, 1905. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 19, 1922.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 9, 1905
GrantedJuly 19, 1905
Term endedJuly 19, 1922
Patent numberCA 94226 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190619081910191219141916191819201922Application filedMay 9, 1905Patent grantedJuly 19, 1905Term endedJuly 19, 1922

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.