Global Patent Index - EP 0385170 A3

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EP 0385170 A3 19901205 - DISCERNMENT PROCESS BETWEEN ORIGINAL PRINTS AND COPIES

Title (en)

DISCERNMENT PROCESS BETWEEN ORIGINAL PRINTS AND COPIES

Publication

EP 0385170 A3 19901205 (DE)

Application

EP 90102717 A 19900212

Priority

DE 3906945 A 19890302

Abstract (en)

[origin: US5064221A] In order to distinguish originals from copies, a method adds substances to printing medium that produces markings, which are not visible to the naked eye and are only recognizable by using special scanners.

IPC 1-7

B41M 3/14; G03C 5/08

IPC 8 full level

B41M 3/14 (2006.01); B44F 1/12 (2006.01); G03C 5/08 (2006.01)

CPC (source: EP US)

B41M 3/144 (2013.01 - EP US); G03C 5/08 (2013.01 - EP US); Y10S 283/902 (2013.01 - EP US)

Citation (search report)

[X] GB 2090194 A 19820707 - GAO GES AUTOMATION ORG
[X] FR 2401465 A1 19790323 - BANK OF ENGLAND [GB]
[X] DE 2654208 A1 19780503 - SODECO COMPTEURS DE GENEVE
[X] FR 2552023 A1 19850322 - AUSSEDAT REY [FR]
[X] WO 8103510 A1 19811210 - GAO GES AUTOMATION ORG [DE], et al
[A] AU 518156 A
[A] US 2162456 A 19390613 - WILHELM KRIEGER, et al
[A] GB 2139955 A 19841121 - GEN ELECTRIC PLC
[X] RESEARCH DISCLOSURE. no. 160, August 1977, HAVANT GB Seite 60 An.: "Printed document and the detection of markings thereupon"

Designated contracting state (EPC)

CH DE FR GB LI

DOCDB simple family (publication)

EP 0385170 A2 19900905; EP 0385170 A3 19901205; DE 3906945 A1 19900913; DE 3906945 C2 19931125; US 5064221 A 19911112

DOCDB simple family (application)

EP 90102717 A 19900212; DE 3906945 A 19890302; US 48752690 A 19900302