Laser oscillation wavelength monitoring device
CA 2281298 A1 · Owner: Oguma, Takefumi · Inventors: Oguma, Takefumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A laser oscillation wavelength monitoring device which can, obtain a changing direction and a changing amount of an oscillation wavelength without any relation with a polarization state of an incident light, whose manufacturing is made to be easy is provided. The laser, oscillation wavelength monitoring device provides a lens that converts an incident light from an optical fiber in which an optical signal is transmitted by a wavelength division multiplex (WDM) technology to a beam, a polarizer that makes an arbitrary linear polarization state in the beam transmit, a polarization splitting means that splits the arbitrary linear polarization state into a first polarization state and a second …
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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 August 31, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 31, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 31, 2021.
- 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.