Automatic on-line monitoring and optimization of optical network switching nodes
CA 2098748 C · Owner: Fatehi, Mohammad T. · Inventors: Heismann, Fred Ludwig; Fatehi, Mohammad T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
12-, An on-line technique which allows the monitoring and adjustment of switching node control parameters within an optical network. More specifically a technique wherein, a low-frequency modulation is induced upon an optical signal as it passes through a node within a switch or sub-system by varying the control voltage applied to that node about what is assumed to be the optimum control voltage level the optical signal at position, downstream from the node is analyzed to ascertain the amplitude frequency, and phase, characteristics of the induced low-frequency modulation and a determination is made, on, the basis of the amplitude frequency, and phase information, as to the whether the …
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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 18, 1993 and granted March 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 18, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 2015.
- 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.