(19)

(11)

EP 0 455 672 A1

(12)

(43) Date of publication: 13.11.1991 Bulletin 1991/46 (21) Application number: 90902124.0 (22) Date of filing: 29.01.1990

(51) International Patent Classification (IPC):  E02D 17/ 13( . ) E02F 3/ 08( . ) E02F 5/ 06( . ) E02F 5/ 02( . ) E02F 1/ 00( . ) E02F 3/ 10( . ) E02F 5/ 14( . ) (86) International application number: PCT/AU1990/000026 (87) International publication number: WO 1990/008856 (09.08.1990 Gazette 1990/19)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 27.01.1989 AU 19890002467 (71) Applicant: GEOCAST SYSTEMS PTY LTD. Currumbin, QLD 4223 (AU)	(72) Inventor: CAMILLERI, Paul Bellevue Park, QLD 4217 (AU) (74) Representative: Kador & Partner  Corneliusstrasse 15 D-80469 München D-80469 München (DE)