Apparatus for detecting and preventing subscriber number cloning in a cellular mobile telephone system
CA 2122988 C · Owner: Sonberg, Kenneth W. · Inventors: Cooper, John R.; Sonberg, Kenneth W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This apparatus (101) operates to discern temporal and spatial anomalies in the use of subscriber numbers in the cellular mobile telephone system, which anomalies are typically indicative of cloning of valid subscriber numbers. The detection of a bogus subscriber unit (B) is accomplished by recording the call origination and termination patterns associated with the subscriber number. The cloning detection apparatus (101) makes use of call origination data to identify concurrent call originations or receptions for a single subscriber number. Further analysis also includes a spatial analysis of successive call activity for a subscriber number. If two successive calls for a particular …
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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 6, 1992 and granted October 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 2014.
- 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.