Optical control method and device
CA 2436709 A1 · Owner: Maeda, Yoshinobu · Inventors: Maeda, Yoshinobu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical control device capable of controlling an optical signal with an optical signal. A first laser beam (L1) of a wavelength (.lambda.1) and a second laser beam (L2) of a wavelength (.lambda.2) are multiplexed by a first coupler (24) and inputted to an optical amplifier device (26). A beam of wavelength (.lambda.2) selected by a first optical filter device (29) out of , the beams from the optical amplification device (26) and a third laser beam (L3) of the wavelength (.lambda.1) are multiplexed by a second optical coupler (24') and inputted to a second optical amplification device (26'). The beam of the wavelength (.lambda.1) selected by a second optical filter element (28) out …
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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 December 25, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 25, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 25, 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.