METHOD OF PREVENTING UNAUTHORIZED REPRODUCTION OF THE CONTENT OF VIDEO CASSETTE TAPES AND APPARATUS FOR EXECUTING THE METHOD - Patent 0324755

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EP 0 324 755 A1

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(43)	Date of publication:
	26.07.1989 Bulletin 1989/30

(21)	Application number: 87906123.0

(22)	Date of filing: 22.09.1987

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International Patent Classification (IPC):

H04N 5/ 91^{( . )}
H04N 5/ 92^{( . )}

H04N 5/ 913^{( . )}

(86)	International application number:
	PCT/SE1987/000426

(87)	International publication number:
	WO 1988/002588 (07.04.1988 Gazette 1988/08)

(84)	Designated Contracting States:
	AT BE CH DE FR GB IT LI LU NL SE

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Priority:

24.09.1986 SE 19860004024

(71)	Applicant: TOGERERTZ, Conny
	S-140 41 Sorunda (SE)

(72)	Inventor:
	TOGERERTZ, Conny S-140 41 Sorunda (SE)

(74)	Representative: Hermansson, Birgitta
	AB Dahls Patentbyra P.O. Box 606 S-182 16 Danderyd S-182 16 Danderyd (SE)

(54)	METHOD OF PREVENTING UNAUTHORIZED REPRODUCTION OF THE CONTENT OF VIDEO CASSETTE TAPES AND APPARATUS FOR EXECUTING THE METHOD