Roaming mobile communication system and method
CA 2184717 C · Owner: Uchiyama, Yasuyuki · Inventors: Nakamura, Hiroshi; Uchiyama, Yasuyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A scheme for enabling a roaming call termination connection for a mobile subscriber between mobile communication networks adopting different roaming number allocation schemes is disclosed. A first mobile communication network in, which a visited location register of a visited network temporarily allocates a roaming, number at a time of call termination connection and a second mobile communication, network in which a gateway location register of a visited network allocates a roaming, number at a time of position registration are connected through an interworking, location register, which functions as a visited location register from a viewpoint of the, first mobile communication …
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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 December 28, 1995 and granted May 9, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 28, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 28, 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.