Fiber optic rotation sensor
CA 2063356 C · Owner: Ashizuka, Norihiro · Inventors: Ashizuka, Norihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fiber optic rotation sensor includes a logic circuit which is supplied with an ambient temperature from a temperature sensor, a light output from an optical fiber sensing loop, and at least two correlation maps from a memory. The correlation maps are prepared at predetermined temperatures by light output values and angular velocities corresponding to the light output values. The logic circuit selects two correlation maps of two temperatures, between which the detected ambient temperature ranges, and provides an angular velocity in accordance with the two temperatures, the detected ambient temperature and the, light output by using the selected two correlation maps.
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 March 18, 1992 and granted July 10, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 18, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 18, 2014.
- 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.