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Expired Canadian patentCanada

Telephone apparatus

CA 128751 A · Owner: Rafferty, Thomas C. · Inventors: Rafferty, Thomas C.

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.

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Why it's free to use

  • Granted October 18, 1910. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 18, 1927.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 11, 1910
GrantedOctober 18, 1910
Term endedOctober 18, 1927
Patent numberCA 128751 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

191119131915191719191921192319251927Application filedJuly 11, 1910Patent grantedOct 18, 1910Term endedOct 18, 1927

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.