CPC Subgroup
G07D 7/005 Testing security markings invisible to the naked eye, e.g. verifying thickened lines or unobtrusive markings or alterations
Full Title
Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency > Testing security markings invisible to the naked eye, e.g. verifying thickened lines or unobtrusive markings or alterations
3 direct subcodes
Child Classifications
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