System for interacting with analog-printed substrate

Registers – Records – Fluorescent – phosphorescent – radiation emitting

Reexamination Certificate

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Details

C235S462010, C235S488000, C347S104000

Reexamination Certificate

active

07841537

ABSTRACT:
A system for interacting with a coded substrate. The system comprises a substrate having human-readable information and machine-readable coded data disposed thereon and a sensing device for reading the machine-readable coded data. The coded data comprises an IR-absorbing phthalocyanine dye having sulfonate groups. A counterion of each sulfonate group is a phosphonium cation.

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