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Expired Canadian patentCanada

Apparatus for reproducing speech sounds

CA 1304497 C · Owner: Sharp Kabushiki Kaisha · Inventors: Watanabe, Osamu

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

Abstract:, In apparatus that reproduces speech sounds at a speed faster than normal reproduction speed, the outputting operation makes it easier to hear speech sounds when a video searching operation is performed. Normal reproduction is performed by another head which is different in azimuth angle from the double azimuth heads used during reproduction at 1.5 times speed. One of the normal two heads is provided as a double azimuth head. Noise caused by reproduction from an adjacent track can thus be removed.

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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 30, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 30, 1985
GrantedJune 30, 1992
Term endedJune 30, 2009
Patent numberCA 1304497 C
Classification (IPC)G11B5/52 +2 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedDec 30, 1985Patent grantedJune 30, 1992Term endedJune 30, 2009

Sources & verification

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