Optical amplifier designs for multichannel fiber optic communication networks
CA 2233526 C · Owner: Flood, Felton Aaron · Inventors: Krol, Mark Francis; Jacob, David; Wigley, Peter Gerard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multichannel fiber optic communication network incorporates multichannel fiber optical amplifiers having different functions but designed to, use substantially identical gain flattening filters. This is achieved by designing, the amplifiers to have total insertion losses such that their respective internal, gains (internal gain = net gain + total insertion loss) are substantially the same, most preferably within 1 dB.
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 March 30, 1998 and granted October 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 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.