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Expired Canadian patentCanada

Process for controlling the starting and stopping of the reading of a recording support

CA 1078511 A · Owner: Thomson-Brandt · Inventors: Roullet, Gerald; Malissin, Roland

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

Abstract of the Disclosure The invention relates to methods for controlling the starting and stopping of the reading of recording supports read in appropriate readers. The method according to the invention comprises providing a zone free from information at least at the beginning of the track of such a support. The reading head of the reader advances rapidly to that zone and after having detected the presence thereof continues its, advance at a normal speed.

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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 27, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 27, 1997.
  • 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 27, 1980
Term endedMay 27, 1997
Patent numberCA 1078511 A
Classification (IPC)G11B21/04 +2 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedMay 27, 1980Term endedMay 27, 1997

Sources & verification

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