A method for conveying management information
CA 2526463 C · Owner: Forsberg, Gunnar · Inventors: Sandell, Johan; Forsberg, Gunnar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for conveying management information in a WDM system from a number of wavelength converters (10a) to a central management unit (16), wherein a management information signal is superimposed on the WDM signal from the respective wavelength converter (10a). A fraction of the optical signal in the common optical transmission line (13a) is tapped off to a detector (18) and the different management information signals are recovered by a receiver unit (19) which is connected to the detector (18). The invention also relates to a WDM system and a pluggable WDM wavelength converter.
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 May 11, 2004 and granted January 28, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 11, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 11, 2026.
- 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.