Assignee

OPTIMUM SOLUTIONS CORP INC

US·1 granted patent·177 citations·filing 1991–1991

Technology mixG06K1

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0186US5229589AQuestionnaire scanning system employing expandable answer mark areas for efficient scanning and mark detectionOPTIMUM SOLUTIONS CORP INC·Filed 1991·Granted Jul 20, 1993·177 cites·16 claims

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