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Expired Canadian patentCanada

Device for the display of data representative of qualities

CA 1109572 A · Owner: Societe Anonyme Dite: Societe Francaise D'Equipements Pour La Navigation Aerienne (S.F.E.N.A.) · Inventors: Grissonnanche, Jean L.

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

The invention relates to a device for the display of data representative of quantities. The device comprises a numbered graduation and a luminous indicator generated directly from digital signals, the indicator being able to assume different positions along said graduation. The device according to the invention facilitates the display of quantities such as reference values, the results of calculations or even of measurement values.

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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 22, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 22, 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.
FiledMay 11, 1978
GrantedSeptember 22, 1981
Term endedSeptember 22, 1998
Patent numberCA 1109572 A
Classification (IPC)G08B5/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedMay 11, 1978Patent grantedSep 22, 1981Term endedSep 22, 1998

Sources & verification

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