(19)
(11) EP 1 552 441 A2

(12)

(88) Date of publication A3:
19.05.2005

(43) Date of publication:
13.07.2005 Bulletin 2005/28

(21) Application number: 01933210.5

(22) Date of filing: 08.05.2001
(51) International Patent Classification (IPC)7: G06F 17/60
(86) International application number:
PCT/US2001/014920
(87) International publication number:
WO 2001/086579 (15.11.2001 Gazette 2001/46)
(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: 08.05.2000 US 567405
01.08.2000 US 629649
11.10.2000 US 689289

(71) Applicant: Digimarc Corporation
Beaverton, OR 97008 (US)

(72) Inventors:
  • CARR, J., Scott
    Tualatin, OR 97062 (US)
  • HANNIGAN, Brett, T.
    Portland, OR 97225 (US)
  • RHOADS, Geoffrey, B.
    West Linn, OR 97068 (US)

(74) Representative: Meddle, Alan Leonard et al
Forrester & BoehmertPettenkoferstrasse 20-22
80336 München
80336 München (DE)

   


(54) ENVELOPES AND PRINTED DOCUMENTS EMPLOYING DIGITAL WATERMARKS, AND RELATED METHODS