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Expired Canadian patentCanada

Method of recording position information of last track recorded with data in directory area

CA 1313710 C · Owner: Canon Kabushiki Kaisha · Inventors: Ogasawara, Yutaka

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

A method of recording data onto a recording medium where plural tracks are provided side by side comprises the steps of: sequentially recording a series of data from a track on one side of a medium; writing index information including position information of a last recorded track, after the series of data are completely recorded, in an area of the medium different from the area where the data is recorded; reading out the position information and seeking the last track on the basis of the readout position information; and recording the next data from a track next to the sought last track.

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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 February 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 16, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 29, 1988
GrantedFebruary 16, 1993
Term endedFebruary 16, 2010
Patent numberCA 1313710 C
Classification (IPC)G11B7/00 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJuly 29, 1988Patent grantedFeb 16, 1993Term endedFeb 16, 2010

Sources & verification

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