Controlled authorization of descrambling of scrambled programs broadcast between different jurisdictions
CA 2010944 C · Owner: General Instrument Corporation · Inventors: Bennett, Christopher John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A control system and a corresponding method for controlling descrambling within a plurality of jurisdictions of scrambled programs broadcast from at least one of said jurisdictions. The control system includes a descrambler authorization system for each jurisdiction for providing authorization signals indicating whether descrambling of a predetermined program by descramblers located within the respective jurisdiction of the descrambler authorization system is authorized; means for distributing to a broadcast system the authorization signals pertaining to said predetermined program that are provided by the descrambler authorization systems for a plurality of said jurisdictions; a broadcast …
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 February 26, 1990 and granted December 21, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 2012.
- 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.