| 摘要 |
1344866 Documents; fraud preventing ESSELTE AB 19 April 1971 [20 April 1970] 9819/71 Heading B6A A security such as a banknote, bond &c. has symbols printed thereon in ink, certain of said symbols being electrically conductive but of a composition which is visually indistinguishable from that of electrically non-conductive symbols of said security. Some of the symbols other than said certain ones may display magnetic sensitivity. |
