Hybrid access architecture for voice messaging systems
CA 2201192 C · Owner: At&T Corp. · Inventors: Susskind, Silvio Maximo; Concepcion, Cronder
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An architecturally and cost efficient method and system are disclosed for accessing a voice messaging platform. An exemplary method for accessing the platform includes: (1) forwarding a telephone call to the platform over foreign exchange lines when the telephone call involves a caller who upon call initiation to a called party subscriber encountered a busy or ring-no-answer condition so that the caller may leave a message for the called party in the called party's mailbox; and (2) routing a telephone call to the platform over a trunk group local to the platform when the telephone call involves a caller-subscriber initiating a telephone call directly to the platform to access his/her …
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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 March 27, 1997 and granted February 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 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.