A path protection method for a wdm network and according node
CA 2487962 A1 · Owner: Marconi Communications Gmbh · Inventors: Guild, Kenneth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a wavelength division multiplex (WDM) optical communications network having a plurality of nodes, each of which comprises a wavelength selective optical cross-connect having a plurality of switching fabrics each switching fabric , being provided for switching wavelength channels of a specific wavelength a , method of transmitting information from a start node to a target node comprises: applying to respective inputs (i' 1) of switching fabrics of the start cross-~connect, at least two wavelength channels (working and protection channels) having different wavelengths but which are modulated with the same information; transmitting the working and protection channels to the target …
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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 July 10, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 10, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 10, 2025.
- 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
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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.