DIFFRACTIVE DEVICE WITH ENHANCED ANTI-COPYING PROTECTION - Patent 0746472

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EP 0 746 472 A1

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(43)	Date of publication:
	11.12.1996 Bulletin 1996/50

(21)	Application number: 95908825.0

(22)	Date of filing: 13.02.1995

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International Patent Classification (IPC):

B42D 15/ 10^{( . )}
G03H 1/ 00^{( . )}
G06K 19/ 16^{( . )}

G02B 5/ 18^{( . )}
G03H 1/ 02^{( . )}

(86)	International application number:
	PCT/AU1995/000062

(87)	International publication number:
	WO 1995/021747 (17.08.1995 Gazette 1995/35)

(84)	Designated Contracting States:
	DE FR GB

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Priority:

14.02.1994 AU 1994PM03829

(71)	Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION
	Campbell, ACT 2601 (AU)

(72)	Inventor:
	HEGEDUS, Zoltan Lindfield, N.S.W. 2070 (AU)

(74)	Representative: Brown, John David
	FORRESTER & BOEHMERT Franz-Joseph-Strasse 38 80801 München 80801 München (DE)

(54)	DIFFRACTIVE DEVICE WITH ENHANCED ANTI-COPYING PROTECTION