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Expired Canadian patentCanada

Panel breaking apparatus

CA 1102295 A · Owner: The Secretary Of State For Defence In Her Britannic Majesty'S Government Of The United Kingdom Of Great Britain And Northern Ireland · Inventors: Turner, Henry W.; Charman, David H.; Rylands, Harry D.

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

Aircraft cockpit canopy friction apparatus wherein a feasible electrical conductor in tape form is embedded in the canopy material with its plane substantially normal to that locally of the canopy. A suitable tape may have a plurality of constructions therein and/or be formed of aluminium sheathed in palladium. Preferably an associated electrical circuit employs an inductance as the primary electrical impulse source.

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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 2, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 13, 1978
GrantedJune 2, 1981
Term endedJune 2, 1998
Patent numberCA 1102295 A
Classification (IPC)B64C1/14 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedDec 13, 1978Patent grantedJune 2, 1981Term endedJune 2, 1998

Sources & verification

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