METHOD FOR PRODUCTION OF SECURITIES PROTECTED AGAINST FORGERY Russian patent published in 2003 - IPC

Abstract RU 2203354 C1

FIELD: production of securities protected against forgery. SUBSTANCE: minimum two chemical regents are introduced in paper or paper-making stock as a colorimetric indicator of authenticity use is made of a universal indicator. EFFECT: enhanced efficiency of protection. 3 cl

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RU 2 203 354 C1

Authors

Frolov M.V.

Drugov I.K.

Pisarev A.G.

Jamnikov L.S.

Dates

2003-04-27—Published

2002-02-18—Filed