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Expired Canadian patentCanada

Method and apparatus for predicting the approaching stall of an aircraft wing

CA 1210504 A · Owner: Marinvent Corporation · Inventors: Maris, John M.

CIPO record

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Abstract From the Canadian patent

The approaching stall of an aircraft wing is predicted using an inherent characteristic of the airflow as the stall is approached. The airspeed over the wing is sensed at a predetermined location spaced above the top surface of the wing input signals, are produced representative of airspeed fluctuations caused by air turbulence, input signals are used to produce a signal representative of the ratio of the airspeed fluctuations to the average airspeed and the ratio signal produces a signal indicating imminent stalling.

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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 August 26, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 26, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 5, 1983
GrantedAugust 26, 1986
Term endedAugust 26, 2003
Patent numberCA 1210504 A
Classification (IPC)G06G7/70

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedJuly 5, 1983Patent grantedAug 26, 1986Term endedAug 26, 2003

Sources & verification

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