Two-dimensional data symbol processing system

Details Two-dimensional data symbol processing system Two-dimensional data symbol processing system

1998-01-23

2000-07-25

Le, Thien M.

Registers

Coded record sensors

Particular sensor structure

2354621, G06K 710

Patent

active

060927291

ABSTRACT:
A first and a second two-dimensional data symbols are printed on a prepaid card. Once the prepaid card is used repeatedly and an operational parameter data of the prepaid card reaches "0", a hole is pierced in the second two-dimensional data symbol. It is determined that the prepaid card is redundant, when the hole is pierced in the second two-dimensional data symbol.

REFERENCES:
patent: 5489158 (1996-02-01), Wang et al.
patent: 5880453 (1999-03-01), Wang et al.

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