Programmable wavelength router
CA 2268131 A1 · Owner: Macro-Vision Communications, L.L.C. · Inventors: Liu, Jian-Yu; Wu, Kuang-Yi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A programmable wavelength router (1300) having a plurality of cascaded stages (100) where each stage (100) receives one or more optical signals (101) comprising a plurality of wavelength division multiplexed (WDM) channels. Each stage (100) divides the received optical signals (101) into divided optical signals (116, 117) comprising a subset of the channels and spatially positions the divided optical signals (116, 117) in response to a control signal applied to each stage (100). Preferably each stage (100) divides a received WDM signal (101) into two subsets (116, 117) that are either single channel or WDM signals (101). A final stage (300) outputs optical signals at desired …
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 15, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 15, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 2019.
- 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.