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Class Information
Number: 283/84
Name: Printed matter > Having revealable concealed information, fraud preventer or detector, use preventer or detector, or identifier > And electrically conductive material > Overlaying vaporizable material revealing information
Description: Subject matter wherein the electrically conductive material is layered, coated, or otherwise positioned over indicia or other information on the article and is composed of a substance which when subject to an electrical current vaporizes thereby revealing the indicia or other information.

Patents under this class:

Patent Number Title Of Patent Date Issued
8540285 Chemical etched two dimensional matrix symbols and method and process for making same Sep. 24, 2013
8137899 Data support with an opticallly variable element Mar. 20, 2012
8033477 Optically variable personalized indicia for identification documents Oct. 11, 2011
7984927 Secret scratch sticker and method of manufacturing the same Jul. 26, 2011
7918485 Security system using conductive and non-conductive regions Apr. 5, 2011
7040663 Value document May. 9, 2006
6343745 Security device Feb. 5, 2002
6260885 Latent fingerprint lifting and recordation device Jul. 17, 2001
6171734 Security printed document to prevent unauthorized copying Jan. 9, 2001
6033392 IV pole bag fabricated from anti-microbial material Mar. 7, 2000
5830609 Security printed document to prevent unauthorized copying Nov. 3, 1998
5704652 Tamper evident and counterfeit resisting informational article and associated method Jan. 6, 1998
4507349 Security medium and secure articles and methods of making same Mar. 26, 1985
4231593 Check with electrically conductive layer Nov. 4, 1980
4230344 Business form with electrically conductive layer Oct. 28, 1980
4166144 Electrosensitive metalized label stock Aug. 28, 1979

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