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Expired Canadian patentCanada

Color video signal reproducing apparatus

CA 1054706 A · Owner: Sony Corporation · Inventors: Yamagiwa, Kazuo; Amari, Shinji

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

A color video signal reproducing apparatus having a plurality of magnetic heads in which respective chrominance signals contained in reproduced color video signals by the plurality of magnetic heads are separately subjected to level control to be equal in level the levels of the, respective chrominance signals are discriminated or detected and when at least one of the levels of the chrominance signals becomes outside the control range by the above level control a so-called color killer operation, is carried out.

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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 May 15, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedMay 15, 1979
Term endedMay 15, 1996
Patent numberCA 1054706 A
Classification (IPC)H04N5/93 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedMay 15, 1979Term endedMay 15, 1996

Sources & verification

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