ACOUSTIC ALARM HAVING A PIEZO-ELECTRIC ELEMENT DRIVEN AT MULTIPLE FREQUENCIES - Patent 1507603

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EP 1 507 603 A1

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(43)	Date of publication:
	23.02.2005 Bulletin 2005/08

(21)	Application number: 03730331.0

(22)	Date of filing: 23.05.2003

(51)	International Patent Classification (IPC)⁷: B06B 1/02

(86)	International application number:
	PCT/GB2003/002268

(87)	International publication number:
	WO 2003/099468 (04.12.2003 Gazette 2003/49)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
	Designated Extension States:
	AL LT LV MK

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Priority:

23.05.2002 GB 0211987

(71)	Applicant: Gent Limited
	Weybridge,Surrey KT13 9UX (GB)

(72)	Inventor:
	BARSON, Michael Warwichshire CV11 6WJ (GB)

(74)	Representative: Wise, Stephen James et al
	c/o RAWORTH MOSS & COOK,36 Sydenham Road Croydon,Surrey CR0 2EF Croydon,Surrey CR0 2EF (GB)

(54)	ACOUSTIC ALARM HAVING A PIEZO-ELECTRIC ELEMENT DRIVEN AT MULTIPLE FREQUENCIES