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Expired Canadian patentCanada

Computer memory back-up with automatic tape positioning

CA 1320271 C · Owner: Tindall, Robert J. · Inventors: Tindall, Robert J.

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 interface apparatus couples a video recording device to the parallel data channel of a computer system and also to the computer video output circuitry so that both, digital information (such as computer programs or data files) and analog information (such as video signals for displaying on a television monitor) may be stored on the same video recording medium. The apparatus permits storage of both digital information and human readable information in a convenient back-to-back relationship. The interface permits the computer video monitor to directly display stored or live video broadcasts, without computer intervention. The invention allows the display of graphic photographic 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 July 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 13, 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.
FiledMarch 31, 1987
GrantedJuly 13, 1993
Term endedJuly 13, 2010
Patent numberCA 1320271 C
Classification (IPC)G06F3/06 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedMarch 31, 1987Patent grantedJuly 13, 1993Term endedJuly 13, 2010

Sources & verification

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