IMPROVEMENTS IN OR RELATING TO MICROPHONES - Patent 0222813

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EP 0 222 813 A1

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(43)	Date of publication:
	27.05.1987 Bulletin 1987/22

(21)	Application number: 86902886.0

(22)	Date of filing: 09.05.1986

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International Patent Classification (IPC):

H04R 1/ 06^{( . )}

H04R 17/ 02^{( . )}

(86)	International application number:
	PCT/GB1986/000257

(87)	International publication number:
	WO 1986/006918 (20.11.1986 Gazette 1986/25)

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

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Priority:

09.05.1985 GB 19850011767

(71)	Applicant: PLESSEY OVERSEAS LIMITED
	Ilford Essex IG1 4AQ (GB)

(72)	Inventor:
	ADAMS, Kevin, Michael, McKeown Towcester Northamptonshire NN12 8DE (GB)

(74)	Representative: Nicholson, Ronald
	Intellectual Property Department The Plessey Company plc 2-60 Vicarage Lane Ilford Essex IG1 4AQ Ilford Essex IG1 4AQ (GB)

(54)	IMPROVEMENTS IN OR RELATING TO MICROPHONES