Shared optical protection in an optical communications network
CA 2292323 A1 · Owner: Baker, Nigel · Inventors: Sullivan, John Patrick; Solheim, Alan Glen; Baker, Nigel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a shared optical protection scheme, a network node is arranged to provide optical, protection signals to at least two protection paths to offer fault protection for a number of the, channels of a wavelength division multiplexed working traffic signal supported by the node, the network node including an optical switch array which couples individual protection, channels to one or other of the protection paths and which is selectively reconfigurable to , reroute individual protection channels to an alternative one of the protection paths in the event, of a transmission fault.
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 6, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 6, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 2021.
- 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.