Method and apparatus to provide a secure multicast transmission
CA 2279468 A1 · Owner: At&T Corp. · Inventors: Bhagavath, Vijay K.; O'Neil, Joseph Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for a secure multicast transmission is provided. A secure, multicast transmission reservation received at a multicast session security platform, is sent from, a sender of a secure multicast transmission and may include for example, information about the, secure multicast transmission and information about which multicast receivers are authorized to, receive the secure multicast transmission. The multicast session security platform also receives a, request for security information from a requesting multicast receiver. The multicast session, security platform may include for example, a multicast session security server capable of, communicating with a plurality of …
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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 July 30, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 30, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2021.
- 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.