HIGH EFFICIENCY FAN WITH ADAPTIVE NOISE CANCELLATION - Patent 0594626

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EP 0 594 626 A1

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(43)	Date of publication:
	04.05.1994 Bulletin 1994/18

(21)	Application number: 92902773.0

(22)	Date of filing: 16.07.1991

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International Patent Classification (IPC):

F04D 29/ 66^{( . )}

G10K 11/ 178^{( . )}

(86)	International application number:
	PCT/US1991/004876

(87)	International publication number:
	WO 1993/002445 (04.02.1993 Gazette 1993/04)

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

(71)	Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
	Lithicum, MD 21090 (US)

(72)	Inventors:
	ZIEGLER, Eldon, W. Columbia, MD 21046 (US) McLOUGHLIN, Micahel, P. Sykesville, MD 21784 (US) VERSCHUEREN, Luc Danbury, CT 06810 (US) EGHTESADI, Khosrow Shelton, CT 06484 (US) ARNOLD, Michael Westminster, MD 21157 (US) FRIESEN, Robert Pasadena, MD 21122 (US)

(74)	Representative: Wilhelm & Dauster Patentanwälte European Patent Attorneys
	Hospitalstrasse 8 D-70174 Stuttgart D-70174 Stuttgart (DE)

(54)	HIGH EFFICIENCY FAN WITH ADAPTIVE NOISE CANCELLATION