Variable light attenuator
CA 2492487 A1 · Owner: Onishi, Tetsuya · Inventors: Fukuda, Kazuki; Onishi, Tetsuya; Nakanishi, Yoichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A variable light attenuator, wherein two mirrors (15) and (16) forming an angle of 90~are formed on the front surface of a mirror member (17) an input , optical fiber (12) and an output optical fiber (13) are held on a fiber array (14) at a specified interval, and an outgoing lens (23) and an incident lens (24) are installed on the front surface of the fiber array (14) so as to be opposed to the end faces of the input optical fiber (12) and the output optical fiber (13), whereby the attenuated amount of light can be varied by linearly moving the mirror member (17) by an actuator (18).
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 June 27, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 27, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 27, 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.