(19)

(11)

EP 1 382 007 A2

(12)

(88) Date of publication A3: 04.09.2003 (43) Date of publication: 21.01.2004 Bulletin 2004/04 (21) Application number: 02719482.8 (22) Date of filing: 12.04.2002

(51) International Patent Classification (IPC)7: G06K 11/16, G01L 1/14 (86) International application number: PCT/US2002/011308 (87) International publication number: WO 2002/084579 (24.10.2002 Gazette 2002/43)

(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: 13.04.2001 US 835040 13.04.2001 US 835049 (71) Applicant: 3M Innovative Properties Company St. Paul, MN 55133-3427 (US)	(72) Inventor: ROBERTS, Jerry, B. Saint Paul, MN 55133-3427 (US) (74) Representative: VOSSIUS & PARTNER  Siebertstrasse 4 81675 München 81675 München (DE)