(19)

(11)

EP 1 428 347 A1

(12)

(43) Date of publication: 16.06.2004 Bulletin 2004/25 (21) Application number: 02768251.7 (22) Date of filing: 06.09.2002

(51) International Patent Classification (IPC)7: H04L 9/32 (86) International application number: PCT/SE2002/001601 (87) International publication number: WO 2003/024019 (20.03.2003 Gazette 2003/12)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 07.09.2001 SE 0102965 (71) Applicant: Anoto AB 223 70 Lund (SE)	(72) Inventors: HANSEN, Mads, Doré DK-9650 Hadsund (DK) ROMEDAHL, Lars S-191 62 Solentuna (SE) THUVESHOLMEN, Mikael S-214 38 Malmö (SE) (74) Representative: Perklev, Karin Cecilia  Anoto Group AB,Scheelevägen 19C 223 70 Lund 223 70 Lund (SE)