Invention Grant
US07864986B2 Optical mark reading that uses a disregard state as part of an unambiguous symbology of marks to fill into response bubbles 有权
使用无视状态作为标记的无歧义符号系统的一部分的光学标记读取来填充响应气泡

Optical mark reading that uses a disregard state as part of an unambiguous symbology of marks to fill into response bubbles
Abstract:
Response bubbles on a scannable form are provided that allow a user to mark the bubbles in a manner that signifies that the user wishes to have a response disregarded.
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