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Priority to JP4259280UpriorityCriticalpatent/JPS6139441Y2/ja
Priority to US06/216,943prioritypatent/US4361138A/en
Priority to EP81301006Aprioritypatent/EP0037191B1/en
Priority to AT81301006Tprioritypatent/ATE4410T1/de
Publication of JPS56144501UpublicationCriticalpatent/JPS56144501U/ja
Application grantedgrantedCritical
Publication of JPS6139441Y2publicationCriticalpatent/JPS6139441Y2/ja