Systems and methods for providing communications through an alternate communication network
CA 2220898 C · Owner: At&T Corp. · Inventors: Partridge, B. Waring, Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Systems and methods for providing a communications path through a selected communications network in the event of a transmission failure on the initial, real-time, communications network are presented. The selected network operates in a non-real-time manner and is configured such that communications may be scheduled for transfer, rather than requiring instantaneous access. The use of the selected network reduces both the loading of and access costs to the real-time network. For example, a user who places an unanswered long-distance call may leave a message for a recipient and that message is transferred to therecipient over the alternate network as time is available on the network …
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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 November 12, 1997 and granted December 26, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2019.
- 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.