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Expired Canadian patentCanada

Regulator for alternate currents

CA 51549 A · Owner: Thomson, Elihu · Inventors: Thomson, Elihu

CIPO record

Overview

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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 5, 1896. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 1913.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 20, 1895
GrantedMarch 5, 1896
Term endedMarch 5, 1913
Patent numberCA 51549 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

189618981900190219041906190819101912Application filedMarch 20, 1895Patent grantedMarch 5, 1896Term endedMarch 5, 1913

Sources & verification

Official CIPO records

Canadian Patents DatabaseClaims, description, documents and status.CIPO

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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.