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Expired Canadian patentCanada

Apparatus for magnetically recording and/or reproducing video signals and which has a still motion reproducing mode of operation

CA 1047639 A · Owner: Sony Corporation · Inventors: Iwata, Hirokimi; Chimura, Toshihiko

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

In an apparatus in which a magnetic tape extends between supply and take-up tape reels in a helical path about at least a portion of the periphery of a guide drum having one or more rotary magnetic heads a capstan and a, pinch roller drive the tape longitudinally during recording and normal reproducing operations, so that video signals are recorded and normally reproduced from parallel tracks extending obliquely across the tape. For a still motion reproducing operation, the pinch roller is moved away from the capstan and a brake applied to a tape reel to halt the driven movement of the tape and thereby permit the heads to scan and reproduce the signals recorded in one of the oblique tracks …

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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 January 30, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 30, 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—
GrantedJanuary 30, 1979
Term endedJanuary 30, 1996
Patent numberCA 1047639 A
Classification (IPC)H04N5/28 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedJan 30, 1979Term endedJan 30, 1996

Sources & verification

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