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Expired Canadian patentCanada

Gravity assisted swingdown support for keyboards or the like

CA 1281699 C · Owner: Northern Telecom Limited · Inventors: Obermeyer, Mark W.

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

Abstract of the Disclosure, A leg assembly for a keyboard allows the keyboard to be placed at alternate working angles. The leg assembly comprises a single leg extending substantially for the length of the keyboard, the leg having thereon a rib which acts as a foot when the leg is in a retracted position and which supports a back edge of the keyboard when the leg is in a deployed position. The leg is pivotally mounted to the keyboard wherein the leg is movable between two stable positions, a first position being the retracted position the, second position being the deployed position which is beyond a quiescent position of the leg. The leg is moved from the retracted position to the deployed …

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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 March 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 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 21, 1987
GrantedMarch 19, 1991
Term endedMarch 19, 2008
Patent numberCA 1281699 C
Classification (IPC)F16M11/40

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedAug 21, 1987Patent grantedMarch 19, 1991Term endedMarch 19, 2008

Sources & verification

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