System and method providing a separate control channel for a wavelength division multiplexed network
CA 2363572 A1 · Owner: Swanson, Eric A. · Inventors: Robidas, Marc; Barry, Richard A.; Patel, Naimish
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A network (FIGURE 1) including a control channel source node (12(1)-12(N)) and a plurality of control channel destination nodes (12(1)-12(N)) is interconnected by communications media in the form of a ring. The control and control channel destination nodes transfer information over a plurality of channels using wavelength-division multiplex techniques. The control channel source node transmits control information to all of the control channel destination nodes over a unitary control channel and each of the control , channel destination nodes drains off a portion of the energy of the signal comprising the control channel to facilitate decoding and processing of the control …
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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 February 16, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 16, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 2022.
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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.