Optical packet router using multiple wavelength labels, and optical packet network that uses multiple wavelength labels
CA 2568209 C · Owner: Harai, Hiroaki · Inventors: Kubota, Fumito; Harai, Hiroaki; Chujo, Wataru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention describes an optical packet router using multiple wavelength labels comprising means for separating data signals from address signals in which means said address signals are identified by wavelength information delimited by a predetermined waveband width and predetermined time differential information included in optical packets; means for demodulating address information delimited by the wavelength information from the address signals to obtain demodulated address information; means for switching an optical switch in accordance with the demodulated address information; and selection means that uses the optical switch to select an optical path for the data signals.
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 March 30, 2001 and granted October 15, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 2023.
- 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.