APPARATUS AND METHOD FOR PREVENTING UNAUTHORIZED CIRCUMVENTION OF TELEVISION PROGRAM BLOCKING FUNCTION - Patent 1135932

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EP 1 135 932 A1

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(43)	Date of publication:
	26.09.2001 Bulletin 2001/39

(21)	Application number: 99951929.1

(22)	Date of filing: 08.10.1999

(51)	International Patent Classification (IPC)⁷: H04N 7/16, H04N 7/00, H04N 17/00

(86)	International application number:
	PCT/US9923/710

(87)	International publication number:
	WO 0021/297 (13.04.2000 Gazette 2000/15)

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

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Priority:

08.10.1998 US 103629 P

(71)	Applicant: Gemstar Development Corporation
	Pasadena, California 91101 (US)

(72)	Inventors:
	LEUNG, Wing, P. Arcadia, CA 91006 (US) TAM, Tony, T. Hawthorne, CA 90250 (US)

(74)	Representative: Kinsler, Maureen Catherine et al
	Kilburn & Strode,20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)

(54)	APPARATUS AND METHOD FOR PREVENTING UNAUTHORIZED CIRCUMVENTION OF TELEVISION PROGRAM BLOCKING FUNCTION