Secure passive tagging scheme
Security code verification for identification cards
Security document database
Security image element tiling scheme
Security label and method of use
Security marking system and method for minimizing pirating...
Security marking system and method for minimizing pirating...
Security marks simulating natural defects for embedding...
Selective code reader
Selectively accented serpentine halftone patterns for embedding
Self-authenticating documents
Self-authenticating documents
Self-clocking glyph shape codes
Self-clocking glyph shape codes
Single width bar code with end code providing bidirectionality
Solid-color embedded security feature
Stereo code
Supplementary coding on inductive debit cards and reading proces
Surface having disposed therein or thereon coded data
Surface having optically readable printed tags