MICRO METAL GRANULE SIGNATURE FOR PREVENTING COPY/FAKE/DUPLICATION OF CURRENCY, STAMP PAPER, CREDIT CARD ETC

摘要

This invention relates to the new method for embedding a unique non-reproducible hidden signature for currency, stamp paper, credit card etc for preventing copy/fake/duplication of currency, stamp paper, credit card. (In the discussion below, for the easiness of reading, we are using the word currency instead of currency, stamp paper, credit card etc)