Terminating data voice call architecture
CA 2250902 C · Owner: Nortel Networks Limited · Inventors: Kenedi, Robert; Henry, Robert V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention resides in the field of telecommunication network architecture which supports voice connections over data networks and publicly switched networks. In one preferred embodiment, the invention permits a voice connection between a personal computer or CPE device (10) and a plain regular telephone terminal (30), over an Internet or data network (20) and a local exchange carrier or local access provider of the PSTN (24) to which the regular telephone terminal is connected.
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 February 26, 1997 and granted February 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 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.