Hybrid wavelength-interchanging cross-connect
CA 2277117 A1 · Owner: Cordell, Robert Roger · Inventors: Chang, Gee-Kung; Cordell, Robert Roger; Bala, Krishna
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wavelength-interchanging cross-connect for a wavelength-division multiplexing (WDM) optical communication system including both transparent optical paths and opaque paths through an electronic switching network such , as a high-speed digital cross-connect switch (DCS) including matching opto-, electronic conversions of the data signal. All optical switching is performed on the input and output sides, for example by mechanically actuated fiber , switches. The DCS receiving optical inputs from the input optical switches and providing optical outputs to the output optical switches performs , switching in the electrical domain and can perform wavelength conversion of the signals passing …
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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 January 6, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 6, 2020.
- 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.