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Expired Canadian patentCanada

Method of recording television signals on a data carrier, and a recording obtained by said method

CA 1059625 A · Owner: Thomson-Brandt · Inventors: Romeas, Rene

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

The invention relates to the recording of television signals along a track carried by an optically readable data carrier. The invention provides a method which consists in recording video information line by line on each track element. A revolution of the recording involves an even number of equal recording sections alloted to a sequence of signals items representative of the line succession. The switching of chrominance components in sequential colour television systems is unaffected by a radial jump of the read out optical spot occurring from one turn of the track to the next one turn.

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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 July 31, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 31, 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—
GrantedJuly 31, 1979
Term endedJuly 31, 1996
Patent numberCA 1059625 A
Classification (IPC)G11B7/00 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedJuly 31, 1979Term endedJuly 31, 1996

Sources & verification

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