Optical switch
CA 2492493 A1 · Owner: Kawamoto, Ryuji · Inventors: Onishi, Tetsuya; Nakanishi, Yoichi; Kawamoto, Ryuji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical switch comprises plural output-side light transmission means (24) at least one input-side light transmission means (7) reflection means (3) , moved so as to be positioned to any one of the output-side light transmission means (24) and to make a light signal to be reflected by the input-side light transmission means (7), and drive means (4) moving the reflection means (3) to each of the output-side light transmission means (24).
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 July 9, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 9, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 9, 2025.
- 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.