| 摘要 |
PROBLEM TO BE SOLVED: To provide a useful bar code capable of responding to the sales of a commodity while determining the price thereof in conformation to the elapsed time by allowing the change of a bar code display according to the lapse of time which was impossible in a conventional bar code so that the information from the bar code read by a bar code reader can be changed according to the lapse of time. SOLUTION: This bar code comprises a combination of two or more bar codes. Each of the bar codes holds at least a natural information part, and at least the natural information part held by one bar code of the two or more bar codes is readable by the bar code reader only after the lapse of a specified time. COPYRIGHT: (C)2003,JPO
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