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Expired Canadian patentCanada

Digital audio system with video output program guide

CA 2189488 C · Owner: Palmer, Douglas W. · Inventors: Palmer, Douglas W.; Kamieniecki, John; Maraska, John F.

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 improved settop terminal of the present invention utilizes a subscriber's television as the preferred graphical interface to simultaneously provide channel in-band and out-of-band program information to a subscriber. A subscriber may tune, view and select from among a plurality of digital audio channels and analog video channels. In-band and out-of-band information is integrated into a multi-page program guide displayed on a subscriber's television. This integration permits subscribers to visually scan and view information about currently playing selections available on other channels without having to switch to them. While listening to a music selection, the subscriber may navigate …

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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

  • Filed November 4, 1996 and granted October 17, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 4, 2016.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 4, 2018.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 4, 1996
GrantedOctober 17, 2000
Term endedNovember 4, 2016
Patent numberCA 2189488 C
Classification (IPC)H04N7/12 +2 more

Timeline

Timeline From CIPO dates

1997199920012003200520072009201120132015Application filedNov 4, 1996Patent grantedOct 17, 2000Term endedNov 4, 2016

Sources & verification

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