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Expired Canadian patentCanada

Rotation detecting device for a tape recorder

CA 1324665 C · Owner: Sony Corporation · Inventors: Koga, Noriyuki

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

The present invention resides in a rotation detecting mechanism for a tape recorder including a movable shut-off lever for setting at least a reproducing lever or a head base at a stop state position, with the reproducing lever or the head base being previously set to the reproducing state position, a movable changeover lever for interchangeably setting the normal reproducing direction or the reverse reproducing direction of a magnetic tape a switching device, for selectively shifting and setting the shut-off lever or the changeover lever, a movable trigger lever for selectively triggering the switching device a detecting lever rotationally biased in a direction which is in accordance with …

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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 November 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 23, 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.
FiledJune 26, 1989
GrantedNovember 23, 1993
Term endedNovember 23, 2010
Patent numberCA 1324665 C
Classification (IPC)G11B15/26 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedJune 26, 1989Patent grantedNov 23, 1993Term endedNov 23, 2010

Sources & verification

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