Expandable telecommunications system
CA 2184726 C · Owner: Excel Switching Corporation · Inventors: Madonna, Robert P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An open, high speed, high bandwidth digital communication network for connecting multiple programmable telecommunications switches to form a large capacity non-blocking, switching system. Each network switching node includes circuitry for transmitting and receiving variable-length packe-, tized information over the network thus enabling each node to, receive information from or transmit information to all other nodes. The network may carry any type of information present in the system including voice, data, video multimedia, con-, trol, configuration and maintenance and the bandwith of the, network may be divided or shared across various information types. Devices such as voice processing …
Read the whole patent
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 6, 1995 and granted September 24, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 6, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 6, 2017.
- 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.