Mobile communication system for home-zone service and method thereof
CA 2291553 C · Owner: Samsung Electronics Co. Ltd. · Inventors: Lee, Yun-Hee
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mobile communication system for providing home zone service and a, method thereof. In the mobile communication system a home zone signal, generator generates a home zone signal a mobile radio terminal receives the, home zone signal and determines whether the mobile radio terminal is currently within or outside a home zone based on the strength of the home zone signal and, a base station communicates with the mobile radio terminal. A visitor location register temporarily stores first and second telephone numbers of a subscriber, for, which different charge rates are applied. A mobile exchange receives call information, a mobile identification number and home zone in/out information, from …
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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 November 26, 1999 and granted August 19, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 26, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2021.
- 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.