Fiber optic bending and positioning sensor
CA 2073162 C · Owner: Danisch, Lee A. · Inventors: Danisch, Lee A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bending, and position, sensor is composed of a fiber optic wave guide, for attachment to the member which is to be bent or, displaced. Light is injected at one end and detected at the other end. Bending of the fiber results in light loss through a surface strip or band along one side of the fiber, this loss being detected. The loss of light detection is used to produce indication of bending or displacement. Two or more wave guides can be oriented to give indication of direction of bending or displacement.
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 July 6, 1992 and granted June 29, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 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.