Method and product for preventing fraud in document identificati

Details Method and product for preventing fraud in document identificati Method and product for preventing fraud in document identificati

1975-02-03

1977-03-01

Charles, Lawrence

Printed matter

Calendar

283 58, 106 21, B42D 1500, C09D 1100

Patent

active

040098923

ABSTRACT:
A bank check includes a secret alphanumeric code designation known only to the correct payee which is covered with a light-impervious cover having a light-sensitive material micro-encapsulated in the surface adjacent to the surface of the bank check. The light-sensitive material is released in a predetermined pattern by pressure exerted against the combination of the cover and the check so that whenever the cover is removed, the light-sensitive material is exposed and the pattern becomes visible to thereby make premature removal detectible.

REFERENCES:
patent: 193221 (1877-07-01), Brooks
patent: 1307560 (1919-06-01), McQueeny
patent: 2374723 (1945-05-01), Barghansen
patent: 2822288 (1958-02-01), Harvey et al.
patent: 3829133 (1974-08-01), Romonoff
patent: 3833395 (1974-09-01), Gosnell
patent: 3886084 (1975-05-01), Vassiliadgs
patent: 3896965 (1975-07-01), Cornell
IBM Technical Disclosure Bulletin vol. 17 No. 7 T. F. Herron 12-74.

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