Virtual local area networks with trunk stations
CA 2317612 C · Owner: Digital Equipment Corporation · Inventors: Rijhsinghani, Anil G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A switch for use in a virtual area network communications system having multiple local area networks interconnected by multiple switches that are connected by a trunk having one or more trunk stations connected directly thereto, includes a first communications port i.e. an access port, that , connects to a first local area network. The first local area network is configured within a virtual area network that also includes a second local area network and a trunk station. The switch also includes a second communications port, i.e. a trunk port connected to the trunk to which the , trunk station is connected by another trunk port. A switch control console detects a multicast …
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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 13, 1999 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 2021.
- 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.