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Expired Canadian patentCanada

System for recording and reproducing digital audio signal

CA 1319749 C · Owner: Chiba, Nobuhiro · Inventors: Chiba, Nobuhiro

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

A system for reproducing digital audio data from a recording medium on which segments of digital audio data are recorded with video data 3 segments of, the digital audio data corresponding to 1 field of the video data, each segment including plural samples of the digital audio data, the number of the samples in each fields out of 5 fields being different from that of remaining 1 field, and each segment further including identification data indicating field numbers I through 3 to which each segment belongs, comprising means for detecting the identification data in each segment or-the digital audio data, means for detecting an error in the identification data, means for deriving numbering …

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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 June 29, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 29, 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.
FiledMarch 28, 1989
GrantedJune 29, 1993
Term endedJune 29, 2010
Patent numberCA 1319749 C
Classification (IPC)H04N5/92 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedMarch 28, 1989Patent grantedJune 29, 1993Term endedJune 29, 2010

Sources & verification

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