EP 0021350 B1 19831116 - METHOD FOR VERIFYING PAPER CURRENCY HAVING A SECURITY MEANS AND PAPER CURRENCY HAVING SUCH MEANS
Title (en)
METHOD FOR VERIFYING PAPER CURRENCY HAVING A SECURITY MEANS AND PAPER CURRENCY HAVING SUCH MEANS
Publication
Application
Priority
DE 2925273 A 19790622
Abstract (en)
[origin: US4609207A] A method of testing a security having a mechanically testable identifying mark, for example a security thread, which has a physical property, for example electric conductivity, which can be measured without contact by means of a first field, for example, an electric field. The physical property can be reproducibly influenced by the effect of a second field, for example an electromagnetic field. If this influence takes place periodically, a signal is produced as a measured variable modulated according to the mutual effect of the two fields.
IPC 1-7
IPC 8 full level
B42D 15/10 (2006.01); B44F 1/12 (2006.01); D21H 21/48 (2006.01); G06K 7/00 (2006.01); G06K 17/00 (2006.01); G06K 19/10 (2006.01); G07D 7/00 (2006.01); G07D 7/04 (2006.01); G07D 7/12 (2006.01); G07D 7/20 (2006.01)
CPC (source: EP US)
D21H 21/48 (2013.01 - EP US); G07D 7/04 (2013.01 - EP US); G07D 7/12 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0021350 A1 19810107; EP 0021350 B1 19831116; AT E5351 T1 19831215; DE 2925273 B1 19810129; DE 2925273 C2 19810917; DE 3065598 D1 19831222; JP S5652476 A 19810511; JP S6337428 B2 19880725; US 4609207 A 19860902
DOCDB simple family (application)
EP 80103424 A 19800619; AT 80103424 T 19800619; DE 2925273 A 19790622; DE 3065598 T 19800619; JP 8412280 A 19800623; US 69037585 A 19850109