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Expired Canadian patentCanada

Audio apparatus for vehicle

CA 1211719 A · Owner: Honda Giken Kogyo Kabushiki Kaisha · Inventors: Nakamura, Shigehira; Sakamoto, Tuneaki; Tanaka, Shuji

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

An audio apparatus for a vehicle comprising: means for, generating an audio signal; amplifying means operatively connected to said generating means for amplifying an audio signal received from said generating means; sound emitting means for emitting sounds and which is driven by said amplyfying means; means for detecting vehicle speed; and gain control means operatively connected to said speed detecting means for generating a control signal and providing it to said amplifying means such, that said control signal increases the gain of the ampifying means according to an increase in the output of said speed detecting means, wherein the output of said amplifying means or the sound, volume, is …

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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 September 23, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 23, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 13, 1984
GrantedSeptember 23, 1986
Term endedSeptember 23, 2003
Patent numberCA 1211719 A
Classification (IPC)H04R3/00 +2 more

Timeline

Timeline From CIPO dates

1985198719891991199319951997199920012003Application filedJune 13, 1984Patent grantedSep 23, 1986Term endedSep 23, 2003

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