Reprogramming system including reprogramming symbol
Requesting assistance using a registration mode
Return mail piece and method of marking the same
Return mail piece and method of marking the same
Return mail piece and method of marking the same
Rotatable disc and method for adjusting its orientation
Rotationally symmetric tags
Rotationally symmetric tags
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