US PATENT SUBCLASS 283 / 83
.~ And electrically conductive material

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}
83.~ And electrically conductive material {1}
84  DF  .~.~> Overlaying vaporizable material revealing information

DEFINITION

Classification: 283/83

And electrically conductive material:

(under subclass 72) Subject matter provided with material capable of conducting electricity.