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US06845912B2 Bar code for measuring distance and position 失效
测量距离和位置的条形码

Bar code for measuring distance and position
Abstract:
A numeric code has 10 characters in its set, each character having two dark bars in nine modules or a “Two of Nine Code”. All bars or gaps of this code are a minimum of two modules in width. Each numeric digit may have and OCR digit embedded into the barcode digit to make it human and machine readable.
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