Method to provide voice call notification and control messaging over a data path
CA 2218231 C · Owner: Interactive Telecom Inc. · Inventors: Mcmullin, William P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
When a public switched telephone network (PSTN) subscriber (28) is occupying their telephone link to connect a personal computer to a computer network, the method provides automatic redirection of an incoming call to said telephone link to a subscriber proxy (38) connected to the PSTN (30) for producing audio interaction with the caller. The subscriber proxy is also connected to said computer network and is capable of sending and receiving messages over said computer network to the subscriber's computer thereby providing the subscriber with a capability to receive notification on said computer of the PSTN call attempt. Optionally the subscriber has a further, capability to interact with …
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 January 14, 1997 and granted April 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 14, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 14, 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.