SPECTACLE LENSES HAVING AN INSIDE-OUT CONICOIDAL FRONT SURFACE - Patent 0571402

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EP 0 571 402 A1

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(43)	Date of publication:
	01.12.1993 Bulletin 1993/48

(21)	Application number: 92902431.0

(22)	Date of filing: 13.12.1991

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International Patent Classification (IPC):

G02C 7/ 02^{( . )}

(86)	International application number:
	PCT/US1991/009385

(87)	International publication number:
	WO 1993/012452 (24.06.1993 Gazette 1993/15)

(84)	Designated Contracting States:
	DE FR GB

(71)	Applicant: AMERICAN OPTICAL CORPORATION
	Southbridge, MA 01550 (US)

(72)	Inventors:
	Winthrop, John, T. Wellesley, MA 02118 (US) WHITNEY, Richard, B. Southbridge, MA 01550 (US)

(74)	Representative: Freylinger, Ernest T.
	Office de Brevets Ernest T. Freylinger 321, route d'Arlon Boîte Postale 48 L-8001 Strassen L-8001 Strassen (LU)

(54)	SPECTACLE LENSES HAVING AN INSIDE-OUT CONICOIDAL FRONT SURFACE