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Priority claimed from JP19521083Aexternal-prioritypatent/JPS6090843A/ja
Priority claimed from JP58195209Aexternal-prioritypatent/JPS6090842A/ja
Application filed by Sumitomo Electric Industries, Nippon Telegraph & TelephonefiledCriticalSumitomo Electric Industries
Priority claimed from EP84307222Aexternal-prioritypatent/EP0139532B1/de
Application grantedgrantedCritical
Publication of ATE38823T1publicationCriticalpatent/ATE38823T1/de