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Expired Canadian patentCanada

Multi-segment head-up display for aircraft

CA 1103791 A · Owner: Sundstrand Data Control, Inc. · Inventors: Muller, Hans R.

CIPO record

Overview

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

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Abstract From the Canadian patent

A head-up visual approach instrument having a display of flight guidance information for a two segment approach to touchdown. The display includes flight path indicia which the pilot aligns with an outside world aiming point, as the touchdown zone of a runway. During the first segment the flight path indicia is positioned as a function of aircraft altitude to define the changing sight angle to the target.

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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 23, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 23, 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.
FiledSeptember 22, 1978
GrantedJune 23, 1981
Term endedJune 23, 1998
Patent numberCA 1103791 A
Classification (IPC)G01C21/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedSep 22, 1978Patent grantedJune 23, 1981Term endedJune 23, 1998

Sources & verification

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