EP 0234885 A2 19870902 - Document bearing characteristic ink-printed indicia juxtaposed with corresponding characteristic synthetic watermark and method for producing same.
Title (en)
Document bearing characteristic ink-printed indicia juxtaposed with corresponding characteristic synthetic watermark and method for producing same.
Title (de)
Dokument, das charakteristische, durch Druck erzeugte, nebeneinander gelegene Tintenindizes mit dazugehörigen charakteristischen Wasserzeichen aufweist und Methode zu dessen Herstellung.
Title (fr)
Document portant des indices imprimés caractéristiques juxtaposés avec des filigranes caractéristiques et correspondants obtenus par impression et procédé pour obtenir ce document.
Publication
Application
Priority
US 83222586 A 19860224
Abstract (en)
A document security system is provided by providing each document with a synthetic watermark, for instance using the process, compositions and apparatus disclosed in the aforementioned U.S. patent of Norris, et al and, within the perimeter of at least one of the symbols which is provided by the synthetic watermark, an identical complementary or otherwise corresponding symbol is printed using ink, paint, dye, stain or similarly contrastingly pigmented substance so as to create, in combination with the synthetic watermark a juxtaposition that can be looked-for as evidence that the document is genuine and its serial number unaltered.
IPC 1-7
IPC 8 full level
B41J 25/20 (2006.01); B41M 1/30 (2006.01); B41M 3/10 (2006.01); B41M 3/14 (2006.01); B42D 15/10 (2006.01)
CPC (source: EP)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0234885 A2 19870902; EP 0234885 A3 19880210; EP 0234885 B1 19910417; AT E62628 T1 19910515; AU 587107 B2 19890803; AU 6915987 A 19870827; CA 1279670 C 19910129; DE 3769330 D1 19910523; DK 94187 A 19870825; DK 94187 D0 19870224; ES 2022326 B3 19911201; FI 870754 A0 19870223; FI 870754 A 19870825; GR 3001815 T3 19921123; JP H0764146 B2 19950712; JP S62231780 A 19871012; MW 1287 A1 19871209; NO 870730 D0 19870223; NO 870730 L 19870825; PT 84352 A 19870301; PT 84352 B 19890914; ZA 871104 B 19871125; ZM 1987 A1 19880328; ZW 3287 A1 19880907
DOCDB simple family (application)
EP 87301485 A 19870220; AT 87301485 T 19870220; AU 6915987 A 19870223; CA 530316 A 19870223; DE 3769330 T 19870220; DK 94187 A 19870224; ES 87301485 T 19870220; FI 870754 A 19870223; GR 910400504 T 19910419; JP 4123487 A 19870224; MW 1287 A 19870217; NO 870730 A 19870223; PT 8435287 A 19870224; ZA 871104 A 19870216; ZM 1987 A 19870223; ZW 3287 A 19870216