Arrangement for implementing a visitor location register in a cellular mobile telecommunications switching system
CA 2078191 A1 · Owner: Lee, Chinmei C. · Inventors: La Forge, Wayne C.; Phelan, James J.; Lee, Chinmei C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, This invention relates to apparatus and methods for providing cellular mobile telecommunication service in accordance with the requirements of the Global Systems for Mobile Communications (GSM) standard. A modular switching system is provided which performs the functions of the mobile switching center plus those of a home location register, authentication center visitor location register, and, equipment identity register. The latter functions are advantageously spread among the modules of the switching system, thus avoiding the getting started cost of expensive dedicated data bases. A wireless global switching module advantageously switches mobile communications control messages …
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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 September 14, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 2014.
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Timeline
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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.