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Expired Canadian patentCanada

Switching method for measuring two neighboring flying targets in succession

CA 1111956 A · Owner: Contraves Ag · Inventors: Eicher, Walter

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Abstract From the Canadian patent

A switching method for measuring or tracking two neighboring flying targets in succession by means of a measuring installation having a television system. A regulation system receives course signals which corre-, spond to the deviation of the image of a flying target or object from the image center, and aligns the line of sight of the television camera at the flying target. An electronic window limits the formation of the deviation signals to the contribution of the image point of the flying target located in the window. During measurement of the first flying target by means of first deviation signals and a first window there is produced about the image center a second window and second …

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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 November 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 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 8, 1978
GrantedNovember 3, 1981
Term endedNovember 3, 1998
Patent numberCA 1111956 A
Classification (IPC)G01S1/70 +1 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedMay 8, 1978Patent grantedNov 3, 1981Term endedNov 3, 1998

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