A SELF-SUPPORTING SPIRAL STAIRWAY AND A METHOD OF PRODUCING SAME - Patent 0547103

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EP 0 547 103 A1

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(43)	Date of publication:
	23.06.1993 Bulletin 1993/25

(21)	Application number: 91915728.0

(22)	Date of filing: 14.08.1991

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International Patent Classification (IPC):

E04F 11/ 032^{( . )}

(86)	International application number:
	PCT/SE1991/000536

(87)	International publication number:
	WO 1992/003625 (05.03.1992 Gazette 1992/06)

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

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Priority:

16.08.1990 SE 19900002669

(71)	Applicants:
	STALHANE, Carl, Henrick S-430 93 Hälsö (SE) STALHANE-BJÖRNBERG, Maria Birgitta Elisabet S-430 93 Hälsö (SE)

(72)	Inventors:
	STALHANE, Carl, Henrick S-430 93 Hälsö (SE) STALHANE-BJÖRNBERG, Maria Birgitta Elisabet S-430 93 Hälsö (SE)

(74)	Representative: Lindberg, Klas Valter Bo
	AWAPATENT AB, Södra Hamngatan 37-41, P.O. Box 11394 S-404 28 Göteborg S-404 28 Göteborg (SE)

(54)	A SELF-SUPPORTING SPIRAL STAIRWAY AND A METHOD OF PRODUCING SAME