SYSTEM AND METHOD FOR DETECTING UNAUTHORIZED USE OF A CELLULAR TELEPHONE - Patent 0988765

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EP 0 988 765 A1

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(43)	Date of publication:
	29.03.2000 Bulletin 2000/13

(21)	Application number: 98928032.6

(22)	Date of filing: 10.06.1998

(51)	International Patent Classification (IPC)⁷: H04Q 7/38

(86)	International application number:
	PCT/CA9800/572

(87)	International publication number:
	WO 9857/514 (17.12.1998 Gazette 1998/50)

(84)	Designated Contracting States:
	DE FR GB

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Priority:

11.06.1997 US 872879

(71)	Applicant: NORTEL NETWORKS CORPORATION
	Montreal,Quebec H2Y 3Y4 (CA)

(72)	Inventor:
	THURLEY, Richard, N. Dallas, TX 75225 (US)

(74)	Representative: Dearling, Bruce Clive et al
	Hepworth Lawrence Bryer & Bizley,Merlin House,Falconry Court,Bakers Lane Epping,Essex CM16 5DQ Epping,Essex CM16 5DQ (GB)

(54)	SYSTEM AND METHOD FOR DETECTING UNAUTHORIZED USE OF A CELLULAR TELEPHONE