Apparatus for determining the position of a movable element with respect to a reference
CA 2078044 A1 · Owner: Proper, Robert Jan · Inventors: Proper, Robert Jan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
11, Title: A measuring apparatus for determining the position of a movable element with respect to a reference. ABSTRACT A measuring apparatus for determining the position of a movable element with respect to a pair of spaced reference means, e.g. mirrors, rotatable around parallel shafts. The movable element emits a light beam from a position to both mirrors. As a result of the rotation, the two mirrors convert the reflected light beam into a light pulse series. Each of these light pulse series is detected by a detector which, detected light pulse series are supplied to a processing unit for calculating from the light pulse series and from a starting pulse the position of the movable …
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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 September 11, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 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.