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Expired Canadian patentCanada

Typewriter mechanism

CA 110623 A · Owner: Chalifour, P. A. · Inventors: Chalifour, P. A.; Laurin, Octave

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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 March 3, 1908. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 1925.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 15, 1906
GrantedMarch 3, 1908
Term endedMarch 3, 1925
Patent numberCA 110623 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

1907190919111913191519171919192119231925Application filedNov 15, 1906Patent grantedMarch 3, 1908Term endedMarch 3, 1925

Sources & verification

Official CIPO records

Canadian Patents DatabaseClaims, description, documents and status.CIPO

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