Fiber optic gyro
CA 2016302 C · Owner: Okada, Kenichi · Inventors: Okada, Kenichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a fiber optic gyro, the operation of a light source which generates light for input as right-handed light and left-handed light into an optical fiber coil is controlled by the ON/OFF operation of a pulse generated by a logic circuit, thereby reducing the quantity of heat generated in the light source. Preferably a DC, component eliminating circuit is provided at the preceding stage of a synchronous detector for eliminating the ON/OFF frequency component of light. More preferably, a gate circuit is provided at the output side of the synchronous detector to cut off both end portions of the synchronous detector output during the ON state of the light source, thereby removing spike noise.
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 May 8, 1990 and granted October 18, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 2012.
- 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.