(19)

(11)

EP 1 240 603 A1

(12)

(43) Date of publication: 18.09.2002 Bulletin 2002/38 (21) Application number: 00988253.1 (22) Date of filing: 20.12.2000

(51) International Patent Classification (IPC)7: G06F 17/30 (86) International application number: PCT/US0034/848 (87) International publication number: WO 0104/6863 (28.06.2001 Gazette 2001/26)

(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: 23.12.1999 US 470825 (71) Applicant: Citrix Systems, Inc. Fort Lauderdale, FL 33309 (US)	(72) Inventors: WATERHOUSE, Simon Mariners WayCambridge CB4 1ZA (GB) HALLS, David Cambridge CB4 1YU (GB) VAN DER LINDEN, Robert Cottenham CB4 8UQ (GB) (74) Representative: O'Connell, David Christopher  Haseltine Lake & Co.,Imperial House,15-19 Kingsway London WC2B 6UD London WC2B 6UD (GB)