Optical inclinometer
CA 2530551 C · Owner: Leica Geosystems Ag · Inventors: Braunecker, Bernhard; Kipfer, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an optical inclinometer. According to the invention an incline-dependent medium (6), e.g. a liquid surface is positioned in the , pupil of an optical subsystem and a detectable wave front is imaged onto a detector (3') by means of said medium (6). A phase displacement of radiation (S) emitted from a radiation source (11) is caused by said medium (6); the interaction of the radiation (S) and the medium (6) can take place during reflection or transmission. An aberration of the wave front caused by the medium (6) can be analysed by means of a wave front sensor and compensated by an evaluation unit (9') or the detector (3'). A wave front sensor having a …
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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 June 1, 2004 and granted April 2, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 1, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 2026.
- 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.