METHOD FOR MANUFACTURE OF SECURITIES, METALLOGRAPHIC PRINTING FORM FOR MANUFACTURE OF SECURITIES, AND SECURITIES
FIELD: manufacture of securities. ^ SUBSTANCE: method involves providing protrusions of equal width at their base portion and of various cross section at apexes within the range of length of each protrusion. ^ EFFECT: increased extent of protection of securities from counterfeit. ^ 17 cl, 4 dwg
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Format: | Patent |
Sprache: | eng ; rus |
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Zusammenfassung: | FIELD: manufacture of securities. ^ SUBSTANCE: method involves providing protrusions of equal width at their base portion and of various cross section at apexes within the range of length of each protrusion. ^ EFFECT: increased extent of protection of securities from counterfeit. ^ 17 cl, 4 dwg |
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