SECURITY INKS

Brand	Owner	Address	Description
ALTAVIA SYSTEMS	WESTVACO CORPORATION	New York NY	Security inks, dyes and coatings; security additives for use in inks, dyes and coatings and papers;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

The present invention provides an emerging security or authentication feature for identification documents and other objects. The security feature is constructed using two differently emission-decaying inks. The inks are arranged so as to convey a first pattern when they are both exited. A second pattern emerges as a first and more rapidly decaying ink decays, but while a second and relatively longer decaying ink still provides emissions. The second pattern can be alphanumeric characters, a barcode, a pattern that will yield a predictable frequency domain representation, a digital watermark, etc. In one implementation, the first pattern is a first machine-readable code and the second pattern is a second, different machine-readable code.