Anti-counterfeiting see-through moire security feature using...

Details Anti-counterfeiting see-through moire security feature using... Anti-counterfeiting see-through moire security feature using...

2002-10-30

2008-09-30

Banks, Derris H. (Department: 3722)

Printed matter

Having revealable concealed information, fraud preventer or...

C283S117000, C428S916000, C428S917000

Reexamination Certificate

active

07429062

ABSTRACT:
Frequency varying patterns are aligned on the front and back surfaces of a document to provide an anti-counterfeiting security device. The frequency varying patterns are reversed images. The document is sufficiently transparent to allow see-through of the pattern on the back of the document to be superimposed on the pattern on the front of the document. The frequency varying patterns will form a moire pattern if misaligned, regardless of the magnitude and the orientation of the misalignment.

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