(19)

(11)

EP 1 763 772 A1

(12)

(43) Date of publication: 21.03.2007 Bulletin 2007/12 (21) Application number: 05733638.0 (22) Date of filing: 22.04.2005

(51) International Patent Classification (IPC):  G06F 15/16(2006.01) (86) International application number: PCT/AU2005/000578 (87) International publication number: WO 2005/103924 (03.11.2005 Gazette 2005/44)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR LV MK YU (30) Priority: 22.04.2004 AU 2004902146 (71) Applicant: Waratek Pty Limited Lindfield, NSW 2070 (AU)	(72) Inventor: HOLT, John Matthew Lindfield, NSW 2070 (AU) (74) Representative: Beresford, Keith Denis Lewis  BERESFORD & Co. 16 High Holborn London WC1V 6BX London WC1V 6BX (GB)