Interconnecting communications networks
CA 2104455 C · Owner: Fujitsu Limited · Inventors: Jahromi, Fazlollah Roohizadegan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Digital cross-connection apparatus is disclosed for use in interconnecting first and second communications network (STM-N) having respective first and second pluralities of data channels, information data and communications management data of the channels in each network being multiplexed together therein. The apparatus comprises an add/drop unit (TTF TSAF, LCS), connected to the said first network (STM-N) and operable selectively to extract therefrom the data of a selected channel of the said first plurality and a, digital switching matrix (LPX) having an output connected to the said second network (STM-n) and having an input connected to the said add/drop unit (TTF TSAF, LCS) for, …
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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 December 21, 1992 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 21, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 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.