Multiple wavelength bidirectional lightwave amplifier
CA 2306765 A1 · Owner: Mci Communications Corporation · Inventors: Mao, Xiaoping Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method for optimizing the performance in a multichannel optical , transmission system of (100) an optical regenerator, by compensating for input signal power fluctuation and for output signal gain change and by , mildly filtering individual wavelengths (110 and 112) between gain block (140) stages. A system and method to provide amplification and refinement of a bidirectional optical signal (100) in a signal amplification and refinement stage.
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 October 22, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 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.