IMPROVEMENTS IN AND RELATING TO TRANSMISSION LINE LOUDSPEAKERS - Patent 0580579

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EP 0 580 579 A1

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(43)	Date of publication:
	02.02.1994 Bulletin 1994/05

(21)	Application number: 91920600.0

(22)	Date of filing: 19.04.1991

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International Patent Classification (IPC):

G10K^{( . )}
G10K 11/ 16^{( . )}
H04R 1/ 28^{( . )}
H04R 25/ 00^{( . )}

H04R^{( . )}
G10K 11/ 178^{( . )}
H04R 1/ 30^{( . )}

(86)	International application number:
	PCT/US1991/002731

(87)	International publication number:
	WO 1992/019080 (29.10.1992 Gazette 1992/27)

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

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

(72)	Inventors:
	EGHTESADI, Khosrow Wilton, CT 06897 (US) HOGE, William, John, Joseph Westminster, MD 21157 (US)

(74)	Representative: Cozens, Paul Dennis, et al
	Mathys & Squire 100 Grays Inn Road London WC1X 8AL London WC1X 8AL (GB)

(54)	IMPROVEMENTS IN AND RELATING TO TRANSMISSION LINE LOUDSPEAKERS