Method for operating a conditional access system for broadcast applications
CA 2387564 C · Owner: Irdeto B.V. · Inventors: Wajs, Andrew Augustine
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method for operating a conditional access system for broadcast applications, which conditional access system comprising a number of subscribers, each subscriber having a terminal including a conditional access module (11) and a secure device (12) for storing entitlements each , entitlement indicating a service for which the subscriber receiving the entitlement is entitled to watch, entitlement management messages (EMM's) are sent to a secure device or group of secure devices. These EMM's each provide an entitlement and a corresponding expiry date wherein the entitlements are , refreshed periodically in accordance with their expiry dates by sending EMM's updating the expiry …
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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 October 4, 2000 and granted June 3, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 4, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 4, 2022.
- 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.