METAL DETECTION IN CONDUCTING MEDIA USING A TWO FREQUENCY SIGNAL

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EP 0 261 142 A1

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(43)	Date of publication:
	30.03.1988 Bulletin 1988/13

(21)	Application number: 87901005.0

(22)	Date of filing: 04.02.1987

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International Patent Classification (IPC):

A61N 1/ 05^{( . )}
G02B 6/ 44^{( . )}

G01V 3/ 10^{( . )}

(86)	International application number:
	PCT/AU1987/000029

(87)	International publication number:
	WO 1987/004801 (13.08.1987 Gazette 1987/18)

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

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Priority:

04.02.1986 AU 19860004428

(71)	Applicant: MINELAB ELECTRONIC INDUSTRIES LTD.
	Adelaide, S.A. 5000 (AU)

(72)	Inventor:
	CANDY, Bruce, Halcro Basket Range, S.A. 5138 (AU)

(54)	METAL DETECTION IN CONDUCTING MEDIA USING A TWO FREQUENCY SIGNAL