(19)

(11)

EP 0 630 511 A1

(12)

(43) Date of publication: 28.12.1994 Bulletin 1994/52 (21) Application number: 93906367.0 (22) Date of filing: 10.03.1993

(51) International Patent Classification (IPC):  G10D 13/ 00( . ) G10K 1/ 06( . ) G10D 13/ 08( . ) G10K 1/ 07( . ) (86) International application number: PCT/AU1993/000101 (87) International publication number: WO 1993/018503 (16.09.1993 Gazette 1993/22)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 10.03.1992 AU 19920001261 (71) Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION Campbell, Australian Capital Territory 2601 (AU)	(72) Inventors: FLETCHER, Neville, Horner Fisher, ACT 2611 (AU) HENDERSON, Moya, Patricia Church Point, NSW 2105 (AU) (74) Representative: Brunner, Michael John, et al  GILL JENNINGS & EVERY Broadgate House 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)