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Expired Canadian patentCanada

Calculating machine

CA 56672 A · Owner: Hietts, De Kerniea James Th0Mas · Inventors: Hietts, De Kerniea James Th0Mas

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 15, 1897. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 15, 1914.
  • 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 6, 1897
GrantedJuly 15, 1897
Term endedJuly 15, 1914
Patent numberCA 56672 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

189819001902190419061908191019121914Application filedMay 6, 1897Patent grantedJuly 15, 1897Term endedJuly 15, 1914

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.