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Expired Canadian patentCanada

Sequence versatile video system

CA 1238112 A · Owner: Geshwind, David M. · Inventors: Geshwind, David M.

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

A video amusement system in which a player must direct his craft along branching paths and the corresponding scenery ahead of the craft, as observed from the vantage of the craft's cockpit, is displayed on a scree. To eliminate discontinuities in the display of the scenery the successive frames of scenery sequences corresponding to parrallel branching paths are interleaved. This allows the read head of the videodisc reader to read the frames of a praticular sequence without skipping more than a few tracks at a time, where on the skipped tracks are recorded the frames of the scenery sequences corresponding to parallel branching paths not selected by the player. In the first preferred …

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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 June 14, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 14, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 8, 1984
GrantedJune 14, 1988
Term endedJune 14, 2005
Patent numberCA 1238112 A
Classification (IPC)G09B5/06 +2 more

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedMay 8, 1984Patent grantedJune 14, 1988Term endedJune 14, 2005

Sources & verification

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