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(11)

EP 0 147 398 A1

(12)

(43) Date of publication: 10.07.1985 Bulletin 1985/28 (21) Application number: 83903484.0 (22) Date of filing: 25.11.1983

(51) International Patent Classification (IPC):  H01S 3/ 03( . ) H01S 3/ 097( . ) H01S 3/ 22( . ) H01S 3/ 038( . ) H01S 3/ 0971( . ) (86) International application number: PCT/AU1983/000172 (87) International publication number: WO 1984/002233 (07.06.1984 Gazette 1984/14)

(84) Designated Contracting States: CH DE FR GB LI SE (30) Priority: 03.12.1982 AU 19820007106 (71) Applicant: THE COMMONWEALTH OF AUSTRALIA Canberra, Australian Capital Territory 2600 (AU)	(72) Inventor: BRANDT, Milan East Doncaster, Vic 3109 (AU) (74) Representative: Crawford, Andrew Birkby, et al  A.A. THORNTON & CO. Northumberland House 303-306 High Holborn London WC1V 7LE London WC1V 7LE (GB)