Telephone switching system for easily implementing modification of connection information and medium storing telephone system control program
CA 2228903 A1 · Owner: Wakabayashi, Kunihiko · Inventors: Wakabayashi, Kunihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A telephone switching system 10 comprises a plurality of physical ports 20, and switches removable terminals based on predetermined connection information wherein such, connection information is arranged to be capable of being stored and rewritten in a RAM 60 by inputting from the terminal. When a physical port connecting to a terminal interface 30 is reconnected from a first terminal to a second terminal, a CPU 40 rewrites the connection information stored in the RAM 60 so that an extension number the user desires is stored for the physical port reconnected with the terminal. Thus, connection information established for another terminal is prevented from being reflected as in the prior art …
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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 February 5, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 5, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 2020.
- 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.