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Priority claimed from JP61073091Aexternal-prioritypatent/JPH0647735B2/en
Priority claimed from JP61073094Aexternal-prioritypatent/JPS62228472A/en
Application filed by Canon KkfiledCriticalCanon Kk
Priority claimed from EP87302782Aexternal-prioritypatent/EP0240306B1/en
Application grantedgrantedCritical
Publication of ATE95251T1publicationCriticalpatent/ATE95251T1/en