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Expired Canadian patentCanada

Color signal modulating system

CA 1109956 A · Owner: Sony Corporation · Inventors: Nishimura, Toshimichi; Yamanaka, Seisuke

CIPO record

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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 color signal modulating system for a color television camera having two CCD's as image pick-up devices for converting optical images into two color signals at alternate scan lines and into a third color signal at consecutive scan lines. Means are provided for developing two color difference signals one of which, is developed from alternate lines of scan. The color difference signals are used to modulate a carrier signal at alternate lines and means are provided to derive sequentially modulated first and second color difference signals simultaneously at an output of the signal modulating system. -i-

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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 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 29, 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.
FiledJanuary 26, 1978
GrantedSeptember 29, 1981
Term endedSeptember 29, 1998
Patent numberCA 1109956 A
Classification (IPC)H04N9/07 +1 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedJan 26, 1978Patent grantedSep 29, 1981Term endedSep 29, 1998

Sources & verification

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