Method of indicating and device for performing the method
CA 1207864 A · Owner: Kockumation Ab · Inventors: Bjorkelund, Mats
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and a device for indicating the presence of an object in a measuring zone (E), and with objects having a measurable cross-sectional shape, also the extent of the object along a reference line (R), makes use of lines (A B) of ra-, diation emitters and radiation receivers located on, opposite sides of the object the receivers being fewer than, the emitters. Between the emitters and the receivers is a network of intersecting radiation paths created in the measuring zone and an electronic unit establishes which intersections (P1) of the radiation paths are screened-off by the object. The invention is applicable for the indication of the presence of objects with arbitrary cross-section …
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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
- Granted July 15, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 15, 2003.
- 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.