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Expired Canadian patentCanada

Video recording and/or reproducing apparatus

CA 1060986 A · Owner: Sony Corporation · Inventors: Kihara, Nobutoshi; Shimada, Osamu

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 recording and/or reproducing video signal information employs, as a record medium a sheet, assembly composed of at least two normally confronting flexible sheets for video signal information recorded for example, on at least one of the sheets. The apparatus has a separator device which separates or spreads apart substantial portions of the sheets, and the separated portion of each sheet has signal information recorded thereon is directed from the separator device in a path about a respective guide drum which has associated rotary transducers, for example, magnetic heads so that, when the sheet assembly and the guide drum and transducers are moved relative to each other 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 August 21, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 21, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedAugust 21, 1979
Term endedAugust 21, 1996
Patent numberCA 1060986 A
Classification (IPC)G11B5/52 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedAug 21, 1979Term endedAug 21, 1996

Sources & verification

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