Network system for mobile radio communication with line switching
CA 2202565 C · Owner: Nec Corporation · Inventors: Matsumoto, Hidehiro; Kikuchi, Tsuneyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A network system for mobile radio communication includes a network constituted by a server unit and a client unit, a radio connection unit connected to a communication network, a public radio base station installed in a cell and a mobile radio terminal which establishes a radio channel with the public radio base station while moving. The network system performs data communication between the server unit and the mobile radio terminal. Each of the server unit and the mobile radio terminal includes a buffer memory and an auxiliary storage unit which hold data. The mobile radio terminal includes an electric field strength monitoring section for monitoring slot errors or a reduction in electric …
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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 April 14, 1997 and granted November 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 14, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 14, 2019.
- 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.