Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Machine readable water based red fluorescent ink compositions

Machine readable water based red fluorescent ink compositions

US Patent 6284027 · Granted Sep 4, 2001

Estimated economic value: $27,819,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Method for determining a printer's signature and the number of dots per inch pri2015
Postal blue ink with high reliability2012
Document security utilizing color gradients2011
Detecting printed image copies using phase-space-encoded fragile watermark2011
Postal blue ink with improved durability2011
Method and system for validating a security marking2011
Signaling labels and fluorescent ink compositions2011
Copy detection using contour analysis2010
Copy detection system using correlations of copy detection patterns2010
Meter tape with location indicator used for unique identification2010
Method and system for validating a security marking2009
Fragile watermark for detecting printed image copies2008