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Expired Canadian patentCanada

Keyboard support apparatus

CA 1289520 C · Owner: W.R. Grace & Co. · Inventors: Cotterill, Michael John

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 keyboard support apparatus includes two substantially rigid parallel rods. Each of the rods has a first respective bracket at one end. Each rod is also slideably connected to a second respective bracket. Also the rods are interconnected via keyboard mounting body which makes a slideable connection with each rod. A manually operable screw fits into a threaded hole in the mounting body and may be adjusted to bear against one of the rods and thereby prevent the mounting body from sliding along the rods. A keyboard or a keyboard shelf is mounted in front of the keyboard mounting body by means of a further structure which connects the underside of the keyboard or shelf to the underside of the …

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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 September 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 24, 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.
FiledSeptember 3, 1987
GrantedSeptember 24, 1991
Term endedSeptember 24, 2008
Patent numberCA 1289520 C
Classification (IPC)F16M11/10 +1 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedSep 3, 1987Patent grantedSep 24, 1991Term endedSep 24, 2008

Sources & verification

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