(19)
(11) EP 1 252 602 A1

(12)

(43) Date of publication:
30.10.2002 Bulletin 2002/44

(21) Application number: 00991733.7

(22) Date of filing: 09.11.2000
(51) International Patent Classification (IPC)7G06K 9/00, B05D 5/00, G03C 3/00
(86) International application number:
PCT/US0042/065
(87) International publication number:
WO 0103/7207 (25.05.2001 Gazette 2001/21)
(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: 09.11.1999 US 164387 P
08.11.2000 US 708273

(71) Applicant: Spectra Science Corporation
Providence, RI 02903 (US)

(72) Inventor:
  • LAWANDY, Nabil, M.
    North Kingstown, RI 02852 (US)

(74) Representative: Read, Matthew Charles et al
Venner Shipley & Co.20 Little Britain
London EC1A 7DH
London EC1A 7DH (GB)

   


(54) AUTHENTICATION AND CODING BY SIZE, SHAPE, AND FLUORESCENCE