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Expired Canadian patentCanada

System for recording and playing back continuous-play and stop-motion signals

CA 1189964 A · Owner: Discovision Associates · Inventors: Golding, Scott M.

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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 improved method and apparatus for recording and playing back a video signal on a video disc, such that selected video frames can be played back in a stop-motion fashion with accompanying audio. Each stop-motion video frame is recorded on a single recording track on the disc, and an associated digitized stopmotion audio signal is combined with a continuousplay video signal and recorded on a plurality of preceding tracks. During playback, the tracks recording the continuous-play video signal are first scanned, to recover and display the continuous-play video frames, and to recover and enter into a memory the digitized stop-motion audio signal. The track recording the corresponding …

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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 2, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 13, 1981
GrantedJuly 2, 1985
Term endedJuly 2, 2002
Patent numberCA 1189964 A
Classification (IPC)G11B20/00 +2 more

Timeline

Timeline From CIPO dates

1982198519881991199419972000Application filedAug 13, 1981Patent grantedJuly 2, 1985Term endedJuly 2, 2002

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