Router device and data communication system
CA 2092166 C · Owner: Nec Corporation · Inventors: Saito, Shuichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a router device of the present invention the, routing controller refers to the routing address table to determine whether the received frame is to be routed (whether the frame passes through two or more router devices, for example). The multiplication controller multiplies the frame selected as the subject of routing and has the path controller set paths between router devices for transmission of the multiplied frames. The frame for which a path is set is transmitted with the destination address of the router device as the other party of communication. When a multiplied frame is received, the multiplication controller extracts an ordinary frame from the multiplied frame and sends it to …
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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 March 22, 1993 and granted July 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 22, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 22, 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.