Technique for effectively providing program material in a cable television system
CA 2460576 C · Owner: Brooks, Paul D. · Inventors: Brooks, Paul D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a cable television system(10) in accordance with the invention program , materials are made available to subscribers in a neighborhood on an as needed basis. Specifically, when a subscriber at a set-top terminal (128-1) selects a program channel to watch, the selection request is transmitted to a headend (100) of the system. In response to such a request a controller(112) in the , headend determines whether the material of the selected program channel has been made available to the neighborhood. If it has been made available the , controller identifies to the set-top terminal (128-1) the carrier which is carrying the requested program material and to which the set-top terminal , …
Read the whole patent
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 August 16, 2002 and granted October 15, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 16, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 2024.
- 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.