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Expired Canadian patentCanada

Electronic gaming device with pseudo-stereophonic sound generating capabilities

CA 2007435 C · Owner: Okada, Satoru · Inventors: Okada, Satoru; Tanaka, Hirokazu

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An electronic gaming (e.g. a video game) device includes a psuedo-stereo sound generator. Plural independent sound generating circuits produce audio signals under microcomputer control. The microcomputer may route the outputs of the plural sound generating circuits independently to one or the other (or both) of two independent audio channel outputs so as to produce pseudo-stereo sound. A selecting circuit automatically mixes the two audio channel outputs together and provides them in monaural form to an internal loudspeaker when no stereophonic headset is connected. A microcomputer controls generation of sounds and music in accordance with a musical pitch (frequency) data structure a …

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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

  • Filed January 9, 1990 and granted July 21, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 9, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 9, 2012.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 9, 1990
GrantedJuly 21, 1998
Term endedJanuary 9, 2010
Patent numberCA 2007435 C
Classification (IPC)H04S5/00 +2 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedJan 9, 1990Patent grantedJuly 21, 1998Term endedJan 9, 2010

Sources & verification

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