Optical wavelength-division multiplex transmission network device using transceiver having 2-input/2-output optical path switch
CA 2316253 C · Owner: Harada, Mitsuru · Inventors: Takahara, Atsushi; Akahani, Junichi; Akatsu, Yuji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical wavelength division multiplexing transmission network system having a star-topology network is disclosed which comprises an arrayed-, waveguide grating type multiplexing/demultiplexing circuit having N input ports and N output, ports, and N transmitting/receiving apparatuses each apparatus including a , transmitter receiver, demultiplexer, multiplexer, and N 2-input and 2-output optical path switching, elements corresponding to N wavelengths so as to cope with a damage to a, transmitting or receiving portion corresponding to a specific wavelength. Each switching element is independently switched between first and second connective, conditions. In the first connective condition …
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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 October 26, 1999 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 26, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2021.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.