Optical fiber gyroscope
CA 2266950 C · Owner: Yuhara, Toshiya · Inventors: Yuhara, Toshiya; Toyoda, Shuhei; Tetsu, Toshiyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an optical fiber gyroscope comprising a fiber coil composed of a lengthy optical fiber wound therearound in a predetermined number of turns a coupler, for optically coupling an optical fiber led from a light source and an optical fiber led to a photodetector and an, optical IC chip arranged between the fiber coil and the coupler and provided with a phase modulator and a polarizer mounted on an optical waveguide, the optical fiber gyroscope further comprising a fiber coil reel around which the lengthy optical fiber for constructing the fiber coil is wound in the predetermined number of turns a coupler reel, around which the optical fibers led in both directions from the coupler …
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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 March 25, 1999 and granted February 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 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.