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Expired Canadian patentCanada

Video signal reproducing apparatus with a track searching arrangement

CA 1086421 A · Owner: Sony Corporation · Inventors: Sakamoto, Hitoshi

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 apparatus for reproducing video signals recorded in successive parallel tracks extending obliquely across a magnetic tape by means of at least one rotary magnetic head which scans the tracks in succession at a rate dependent on the speed at which the tape is moved longitudinally by a tape transport assembly, is provided with a track searching arrangement which includes a manually rotatable wheel and a control circuit for regulating the speed and direction of movement of the tape by the tape transport assembly in dependence on the speed and direction of rotation of the manually rotatable wheel. In response to relatively slow-speed rotation of the wheel within a first speed range, the …

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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, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 23, 1997.
  • 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 23, 1977
GrantedSeptember 23, 1980
Term endedSeptember 23, 1997
Patent numberCA 1086421 A
Classification (IPC)G11B27/02 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedJune 23, 1977Patent grantedSep 23, 1980Term endedSep 23, 1997

Sources & verification

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