Signal processing system for achieving per-call control
CA 2234309 C · Owner: Chen, Jiayu · Inventors: Ash, Gerald Richard; Chen, Jiayu; Lee, Young
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A telecommunications network (10) includes an Originating Switching System (12 1) and a Terminating Switching System (12 2) linked by a plurality of trunks(20 1-20 4). For an incoming call it receives the Originating Switching System establishes a Circuit Selection Capability Indicator (CSCI) that determines what enhancement if any, the Originating Switching System will provide to the call. The Originating Switching System also utilizes the CSCI to select an appropriate trunk that is compatible with type of call enhancement, if any, to route the call to the Terminating Switching System which also enhances the call in accordance with the CSCI. The signal processing system per-call-control …
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 April 8, 1998 and granted June 12, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 8, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 8, 2020.
- 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.