Node in an optical signal transmission network, and method of retaining the communication on the occurrence of a failure
CA 2196121 A1 · Owner: Meli, Fausto · Inventors: Meli, Fausto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The optical node comprises two working directional switches (22,27) connected serially in a primary ring line (2), respectively ahead of and after an extracting and/or inserting unit (11), and further connected serially in a secondary ring line (3), which are adapted to controllably switch the optical signal path between the primary ring line (2) and the secondary ring line (3), and to the extracting and/or inserting unit (11). The node further comprises two backup directional switches associated with the working directional switches and connected operatively in the primary (2) and secondary (3) ring lines to restore the optical node (10) to proper operation on the occurrence of a failure …
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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 January 28, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 28, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2019.
- 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.