(19)

(11)

EP 1 358 644 A1

(12)

(43) Date of publication: 05.11.2003 Bulletin 2003/45 (21) Application number: 01272562.8 (22) Date of filing: 28.12.2001

(51) International Patent Classification (IPC)7: G08B 13/24, G01V 15/00 (86) International application number: PCT/AU0101/676 (87) International publication number: WO 0205/4365 (11.07.2002 Gazette 2002/28)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 29.12.2000 AU PP235200 14.02.2001 AU PP307201 23.08.2001 AU PP719501 19.10.2001 AU PP833601 (71) Applicant: Tagsys Australia Pty Ltd Adalaide, South Australia 5000 (AU)	(72) Inventors: COLE, Peter, Harold West Lakes Shore, South Australia 5020 (AU) HALL, David, Malcolm Lockleys, South Australia 5032 (AU) (74) Representative: Boydell, John Christopher  Stevens, Hewlett & PerkinsHalton House20/23 Holborn London EC1N 2JD London EC1N 2JD (GB)