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Expired Canadian patentCanada

Speed regulating device

CA 185752 A · Owner: Douglas, Theodore · Inventors: Douglas, Theodore

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 30, 1918. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 30, 1935.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 13, 1918
GrantedJuly 30, 1918
Term endedJuly 30, 1935
Patent numberCA 185752 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

191919211923192519271929193119331935Application filedJune 13, 1918Patent grantedJuly 30, 1918Term endedJuly 30, 1935

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.