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Priority claimed from JP2576977Aexternal-prioritypatent/JPS53110830A/en
Priority claimed from JP3919077Aexternal-prioritypatent/JPS53124432A/en
Priority claimed from GB9126/78Aexternal-prioritypatent/GB1600817A/en
Application filed by Ricoh KkfiledCriticalRicoh Kk
Publication of HK23287ApublicationCriticalpatent/HK23287A/en