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Expired Canadian patentCanada

Automatic degaussing in television receiver with voltage regulating transformer

CA 1055149 A · Owner: Zenith Radio Corporation · Inventors: Manske, Hans E.

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 television receiver includes a voltage regulating transformer and resonating capacitor for supplying power to receiver circuitry and to a color picture tube subject to extraneous magnetization. An automatic degaussing circuit includes a degaussing coil adjacent to the picture tube, a thermally responsive element and a tuning capacitor, are series connected across a portion of the transformer secondary winding. - 1 -

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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 22, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 22, 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 22, 1979
Term endedMay 22, 1996
Patent numberCA 1055149 A
Classification (IPC)H04N9/29 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedMay 22, 1979Term endedMay 22, 1996

Sources & verification

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