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Expired Canadian patentCanada

Signal processing apparatus

CA 1312944 C · Owner: Tanaka, Yutaka · Inventors: Matsunaga, Osamu; Tanaka, Yutaka

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 signal processing apparatus comprising a plurality of video signal correlation detecting means for detecting the values of video signal correlations in a plurality of ways with respect to the displayed picture, and intermediate value selecting means for selecting an intermediate value among the detected values of the plurality of video signal correlations whereby a changing video signal is processed by utilizing a correlation of a proper way.

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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 January 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 19, 2010.
  • 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 19, 1987
GrantedJanuary 19, 1993
Term endedJanuary 19, 2010
Patent numberCA 1312944 C
Classification (IPC)H04N9/64 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedMay 19, 1987Patent grantedJan 19, 1993Term endedJan 19, 2010

Sources & verification

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