EP 0335232 A3 19901107 - METHOD FOR ASSURING THE TRACING OF ACTS OF COPYING AND ASSEMBLY OF INFORMATION CARRIERS
Title (en)
METHOD FOR ASSURING THE TRACING OF ACTS OF COPYING AND ASSEMBLY OF INFORMATION CARRIERS
Publication
Application
Priority
DE 3810652 A 19880329
Abstract (en)
[origin: EP0335232A2] In order to achieve and maintain traceability as to which party made a copy (1a, 1b) of a data carrier (1), an identification (5a, 5b) is provided, distributed over a region (3) of the data carrier (1) for useful information, specifically for each recipient (A, B). By close coupling of the identification (5a, 5b) with the useful information distributed to all recipients (A, B) identically, it is achieved that the identification (5a, 5b) remains interpretable, even in the case of repeated copying, at least as long as the useful information applied to the region (3) of the carrier (1). <IMAGE>
IPC 1-7
IPC 8 full level
B41M 3/14 (2006.01); B44F 1/12 (2006.01); G03B 21/00 (2006.01); G03C 5/08 (2006.01)
CPC (source: EP)
Citation (search report)
- [E] WO 8907819 A1 19890824 - VOGEL PETER S [AU]
- [X] US 3831007 A 19740820 - BRAUN J
- [YD] DE 3325116 A1 19850228 - SUEKA SUEDDEUTSCHE SPEZIALDRUC [DE]
- [Y] US 4033059 A 19770705 - HUTTON ROBERT GORDON, et al
- [Y] US RE31211 E 19830419
- [YD] CH 645308 A5 19840928 - ORELL FUESSLI GRAPH BETR AG [CH]
- [A] DE 3130182 A1 19830217 - GAO GES AUTOMATION ORG [DE]
- [X] IBM TECHNICAL DISCLOSURE BULLETIN. vol. 23, no. 8, Januar 1981, NEW YORK US Seiten 3550 - 3551; C. P. Ludeman: "Document security system for copy machines"
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0335232 A2 19891004; EP 0335232 A3 19901107; DE 3810652 A1 19891012; JP H0234827 A 19900205
DOCDB simple family (application)
EP 89105086 A 19890322; DE 3810652 A 19880329; JP 7525489 A 19890329