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Expired Canadian patentCanada

Multiple audio signal processing system

CA 1325385 C · Owner: Ro, Il-Young · Inventors: Ro, Il-Young

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 multiple audio signal processing system is disclosed which comprises a composite system which is the combination of a digital audio tape recorder (DAT) and a compact disc player (CD) a signal path controller, and a system controller wherein the, signal path controller selects one signal among a signal from the CD, a digital signal and an analog signal from external sources to supply the selected signal to the DAT and also, selects one signal among signals from the CD and the DAT to output the selected signal in the form of a digital or analog signal under the control of the system controller and the, composite system receives one signal among the signal from the CD, the digital and analog …

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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 21, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 21, 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.
FiledAugust 16, 1989
GrantedDecember 21, 1993
Term endedDecember 21, 2010
Patent numberCA 1325385 C
Classification (IPC)G11B31/00 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedAug 16, 1989Patent grantedDec 21, 1993Term endedDec 21, 2010

Sources & verification

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