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Application filedfiledCritical
Priority to JP1977117416UpriorityCriticalpatent/JPS5717734Y2/ja
Priority to DE19782831984prioritypatent/DE2831984A1/de
Publication of JPS5441983UpublicationCriticalpatent/JPS5441983U/ja
Application grantedgrantedCritical
Publication of JPS5717734Y2publicationCriticalpatent/JPS5717734Y2/ja
Priority to US06/845,341prioritypatent/US4731503A/en