Packet switching method and system with self-routing switch
CA 2049367 C · Owner: Hitachi Software Engineering Co. Ltd. · Inventors: Suzuki, Taihei; Tanabe, Shiro; Kubo, Akinori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a packet network having a plurality of local switching units each connected to a plurality of packet lines and at least one cross-connect unit connected to each local switching unit through at least one transit line having a predetermined transmission capacity a plurality of virtual paths for interconnecting the plurality of local switching units through the cross-connect unit are defined on each transit line without fixedly assigning communication bandwidths to individual virtual paths and, in respect of the individual transit lines, values of communication bandwidths assigned to virtual channels which have already been established in virtual paths present on the transit lines are …
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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 August 16, 1991 and granted June 24, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 16, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 2013.
- 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.