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Priority claimed from JP1203535Aexternal-prioritypatent/JP3020963B2/en
Priority claimed from JP1336142Aexternal-prioritypatent/JP2790347B2/en
Priority claimed from JP1336143Aexternal-prioritypatent/JPH03193459A/en
Application filed by Canon KkfiledCriticalCanon Kk
Publication of SG74554A1publicationCriticalpatent/SG74554A1/en