Echo canceller in a communication system at a terminal
CA 2394370 A1 · Owner: Beaugeant, Christophe · Inventors: Scalart, Pascal; Le Tourneur, Gregoire; Beaugeant, Christophe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a device for processing echo in a communication system at a terminal comprising a first transducer (4) and a second transducer (5) said echo processing device (1, 101, 201) itself including an adaptive echo cancelling device (3, 103, 203). The invention is characterised in that said echo processing device comprises a device (2. 102 202) processing residual , echo at the output of said adaptive echo cancelling device (3 103, 203).
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 December 8, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 8, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 8, 2022.
- 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.