ACOUSTIC TRANSDUCERS USING A WORKING FLUID - Patent 0906611

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EP 0 906 611 A1

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(43)	Date of publication:
	07.04.1999 Bulletin 1999/14

(21)	Application number: 97931893.0

(22)	Date of filing: 20.06.1997

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International Patent Classification (IPC):

G10K 7/ 06^{( . )}

G10K 9/ 08^{( . )}

(86)	International application number:
	PCT/GB1997/001684

(87)	International publication number:
	WO 1997/050077 (31.12.1997 Gazette 1998/05)

(84)	Designated Contracting States:
	DE FR GB IT NL

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Priority:

22.06.1996 GB 19960013150

(71)	Applicant: ER FLUID DEVELOPMENTS LIMITED
	Brough Bradwell Sheffield S30 2HG (GB)

(72)	Inventors:
	STANGROOM, James, E., ER Fluid Developments Ltd. Bradwell, Sheffield S30 2HG (GB) WALTON, Rex, ER Fluid Developments Limited Bradwell, Sheffield S30 2HG (GB)

(74)	Representative: Long, Edward Anthony, et al
	Hulse & Co, St. James House, 8th Floor, Vicar Lane Sheffield S1 2EX Sheffield S1 2EX (GB)

(54)	ACOUSTIC TRANSDUCERS USING A WORKING FLUID