Transaction based interactive television system
CA 2124000 C · Owner: Zing Systems, L.P. · Inventors: Lappington, John P.; Marshall, Susan K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transaction based interactive televiion system (20) includes an insertion system (22) for inserting in a preferred embodiment coded interactive information in the vertical blanking interval of a standard television signal. The signal is received and decoded by a decoded system (24) which includes a settop decoder (30) which sends an infrared signal to a handheld device (28). The viewer using the handheld device (28) can interact with a game, sports, or educational or event or other presentation on television. The system includes proprietary high level command language and a proprietary set of PIU tables which are handheld in non-volatile memory (74) of the handheld device (28). The PIU …
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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 2, 1992 and granted July 23, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 2, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.