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Priority claimed from JP19137993Aexternal-prioritypatent/JPH0740544A/ja
Priority claimed from JP21978793Aexternal-prioritypatent/JP2931511B2/ja
Priority claimed from JP12596594Aexternal-prioritypatent/JP3187652B2/ja
Application filed by Canon Kabushiki KaishafiledCriticalCanon Kabushiki Kaisha
Publication of HK1011663A1publicationCriticalpatent/HK1011663A1/zh
Publication of HK1011663BpublicationCriticalpatent/HK1011663B/zh