Dispersion compensation in optical communications systems
CA 2471848 A1 · Owner: Marconi Communications Limited · Inventors: Claringburn, Harry Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Dispersion compensation is applied to an optical signal first by a coarse compensation applied to the signal multiplex on a communications network and then by a fine adjustable compensation applied to individual signal channels dropped from the network. The error rate is measured for example using , forward error correction and the dispersion compensation set to minimise the error rate.
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 24, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 24, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 24, 2024.
- 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.