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Priority claimed from JP2825681Aexternal-prioritypatent/JPS5752511A/ja
Priority claimed from JP11824381Aexternal-prioritypatent/JPS5820885A/ja
Priority claimed from JP12443981Aexternal-prioritypatent/JPS5826799A/ja
Application filed by Nippon Cable System IncfiledCriticalNippon Cable System Inc
Publication of IT8219294A0publicationCriticalpatent/IT8219294A0/it
Application grantedgrantedCritical
Publication of IT1152101BpublicationCriticalpatent/IT1152101B/it