Optical 1xn and nxn switching matrix having a tree structure
CA 2199848 C · Owner: Stoll, Lothar · Inventors: Muller, Gustav; Stoll, Lothar; Schienle, Meinrad
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1. Optical 1×N and N×N switching matrix having a tree structure. 2.1 In the case of 1×N switching matrices having a tree structure, in which an optical input (1 0) is connected to N outputs (1 1) by means of an optical waveguide structure (1) which branches like a tree and in which an, optical changeover switch (4) is arranged in each junction point (3) of the waveguide structure it is intended, to improve the crosstalk suppression. 2.2 To this end in each case one gate switch (5) is, assigned to each output (1 1) for optional release and blocking of this output (1 1) as a function of a switching state of the changeover switch (4) of a junction point (3) from which a branching waveguide …
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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 13, 1995 and granted November 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 13, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 13, 2017.
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