(19)

(11)

EP 1 325 464 A1

(12)

(43) Date of publication: 09.07.2003 Bulletin 2003/28 (21) Application number: 01979700.0 (22) Date of filing: 10.10.2001

(51) International Patent Classification (IPC)7: G06K 9/00, G09C 5/00 (86) International application number: PCT/US0131/784 (87) International publication number: WO 0203/1752 (18.04.2002 Gazette 2002/16)

(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: 11.10.2000 US 689226 20.04.2001 US 840016 23.08.2001 US 938870 (71) Applicant: Digimarc Corporation Tualatin,Oregon 97062 (US)	(72) Inventor: BRUNK, Hugh, L. Portland, OR 97202 (US) (74) Representative: Meddle, Alan Leonard  Forrester & BoehmertPettenkoferstrasse 20-22 80336 München 80336 München (DE)