Document security system

Details Document security system Document security system

1983-07-18

1990-02-27

Eley, Timothy V.

Printed matter

Having revealable concealed information, fraud preventer or...

Utilizing chemical

283 70, 283 74, 283 77, 283901, B42D 1500

Patent

active

049039911

ABSTRACT:
A system for verifying the authenticity of documents such as negotiable instruments wherein a field of photoactive microcapsules is provided in a localized area on the document. By image-wise exposing the document, a latent image of a verification meand such as a signature, fingerprint, or the like can be produced on the document which can be instantly developed upon rupturing the microcapsules to verify the authenticity of the document when it is presented.

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Research Disclosure, #18747, Nov. 1979, (No. 187?).
"What's Ahead", Lloyd E. Varden, Modern Photography, p. 86, 1958.

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