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Expired Canadian patentCanada

Indoor telephone network interface device

CA 1284685 C · Owner: Gte Control Devices Of Puerto Rico Incorporated · Inventors: Dowler, David H.; Crane, Robert A.

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

of the Invention, A telephone network interface device adapted to be placed within a standard receptacle box including a face plate and a housing containing terminal posts disposed on the rear of the housing. A cover is detachably arranged over an array of terminal posts that are adapted to be connected to the telephone company's portion of the telephone network and terminal posts are exposed for subscriber access to the portion of the posts that are connected to the subscriber's portion of the telephone system.

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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 June 4, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 4, 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.
FiledAugust 20, 1987
GrantedJune 4, 1991
Term endedJune 4, 2008
Patent numberCA 1284685 C
Classification (IPC)H04M1/00 +1 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedAug 20, 1987Patent grantedJune 4, 1991Term endedJune 4, 2008

Sources & verification

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