US PATENT SUBCLASS 283 / 95
.~ Utilizing chemical

Current as of: June, 1999
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283 /   HD   PRINTED MATTER

72  DF  HAVING REVEALABLE CONCEALED INFORMATION, FRAUD PREVENTER OR DETECTOR, USE PREVENTER OR DETECTOR, OR IDENTIFIER {15}
95.~ Utilizing chemical

DEFINITION

Classification: 283/95

Utilizing chemical:

(under subclass 72) Subject matter wherein the information is made readable or understandable, or the larceny prevention or signaling occurs by the use of a substance which is capable of chemically reacting with a portion of the printed matter.