Method of operating a packet switching network
CA 2017866 C · Owner: Northern Telecom Limited · Inventors: Onder, Yavuz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of operating a packet switching network is disclosed in which an X.25 terminal or computer can access the network via a public switched telephone network (PSTN) or a circuit switched public data network (CSPDN) in accordance with CCITT standard X.32. An access port provides dial in and out service which automatically adapts to both the level-2 addressing (DCE or DTE) and protocol (LAPB or LAPBE) of the terminal or computer connected via the PSTN or CSPDN.
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 May 30, 1990 and granted July 23, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 2012.
- 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.