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Expired Canadian patentCanada

Rotary head assembly

CA 1077168 A · Owner: Sony Corporation · Inventors: Saito, Etsuro; Takahashi, Katsumasa

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

A rotary head assembly for example, for recording and/, or reproducing video signals on a recording tape which is wrapped about at least a portion of the periphery of a tape guide drum. A head member is secured to the other ends of the resilient cantilevered support arms so that centrifugal movement of the head member through a gap of the guide drum thereby to engage with the tape wrapped about the drum and is resiliently resisted by flexing of the cantilevered support arms. The rotary assembly includes a support moved in a circular path concentric with the guide drum for example, by being secured to a rotated part of the guide drum. The support has a radially outward directed portion and …

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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 May 6, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 6, 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.
Filed—
GrantedMay 6, 1980
Term endedMay 6, 1997
Patent numberCA 1077168 A
Classification (IPC)G11B5/10 +2 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedMay 6, 1980Term endedMay 6, 1997

Sources & verification

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