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Expired Canadian patentCanada

Apparatus and method for recording and/or reproducing a digital signal

CA 1325270 C · Owner: Ishibashi, Hiroshi · Inventors: Inazawa, Yoshizumi; Odaka, Kentaro; Yamada, Masaki

CIPO record

Overview

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Abstract From the Canadian patent

An apparatus and method for recording and/or reproducing digital data employing a DAT (digital audio tape recorder) adapted to record and/or reproduce data from a computer or the like in accordance with the DAT format. Main data is recorded in a main area of a track while error detecting data for the main data recorded in the main area of the track is recorded in a sub-area of the track to thereby easily detect an error in the main data.

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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 December 14, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 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.
FiledOctober 26, 1988
GrantedDecember 14, 1993
Term endedDecember 14, 2010
Patent numberCA 1325270 C
Classification (IPC)G11B20/12 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedOct 26, 1988Patent grantedDec 14, 1993Term endedDec 14, 2010

Sources & verification

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