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Expired Canadian patentCanada

Device for locking brakes release valve

CA 1289765 C · Owner: Legare, Gilles M. · Inventors: Legare, Gilles M.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A locking device for parking brakes of trucks using an internally grooved knob on the instrument panel to control air brakes. A sleeve covers the knob and is locked to the knob to prevent pushing on the knob and removing it from the knob. The sleeve is provided with a lock plug for engaging the groove in the knob.

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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.

Why it's free to use

  • Granted October 1, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 1, 2008.
  • 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 1, 1987
GrantedOctober 1, 1991
Term endedOctober 1, 2008
Patent numberCA 1289765 C
Classification (IPC)F16B41/00

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedJune 1, 1987Patent grantedOct 1, 1991Term endedOct 1, 2008

Sources & verification

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