Ecm and emm distribution for multimedia multicast content
CA 2425159 A1 · Owner: Medvinsky, Alexander · Inventors: Medvinsky, Alexander; Sprunk, Eric; Peterka, Petr
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
According to one embodiment of the invention a free preview of a program can , be provided to client computers in a multicasting system. This can allow viewers in the multicasting system to view a first portion of the program before deciding whether to order the program content. According to another embodiment, various distribution methods can be accomplished using encryption keys to distribute progam content. According to yet another embodiment an , initial viewing period can be provided to allow negociation of the encryption keys. According to another embodiment, rules and conditions for providing content in a multicasting environment can be utilized.
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 October 26, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2023.
- 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.