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(11)

EP 0 413 733 A1

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(43) Date of publication: 27.02.1991 Bulletin 1991/09 (21) Application number: 89905383.0 (22) Date of filing: 21.04.1989

(51) International Patent Classification (IPC):  G07B 15/ 00( . ) G06K 19/ 07( . ) G07F 7/ 08( . ) G06K 19/ 00( . ) G07F 1/ 06( . ) G07F 7/ 10( . ) (86) International application number: PCT/AU1989/000175 (87) International publication number: WO 1989/010599 (02.11.1989 Gazette 1989/26)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 22.04.1988 AU 19880007880 (71) Applicant: MAGELLAN CORPORATION (AUSTRALIA) PTY. LTD. Perth, W.A. 6000 (AU)	(72) Inventor: BROOKS, David, Robert Perth, W.A. 6000 (AU) (74) Representative: Newstead, Michael John, et al  Page Hargrave Temple Gate House Temple Gate Bristol BS1 6PL Bristol BS1 6PL (GB)