Apparatus for encryption key management
CA 2498684 C · Owner: Wasilewski, Anthony J. · Inventors: Mattox, Mark D.; Wasilewski, Anthony J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus (102) and a receiver (110) which are in a broadband , communication system (100) includes the logic (232) necessary for encrypting content (254) through the use of encryption keys. This content is received by the receivers (110). The receiver (110) validates the keys and denies the use of the content (254) if the keys become invalid.
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 September 17, 2002 and granted March 20, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 17, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 17, 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.