Light control device
CA 2418575 A1 · Owner: Norimatsu, Toshihide · Inventors: Norimatsu, Toshihide
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an optical switch (an optical device) of the type in which a moving plate 31 is displaced to switch optical paths by displacement of mirrors 38 mounted on the moving plate 31 the moving plate 31 is, supported at both ends to side beams 33 through paired support beams 32 extended from opposed side surfaces of the moving plate in parallel to its plate surface so that the moving plate 31 is displaced in a plane in which its plate surface lies; and the moving plate 31 the support beams 32, the side, beams 33 and drive means 34 35 for driving the moving plate are formed from one substrate.
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 February 5, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 5, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 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.