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Priority to JP1968026740UpriorityCriticalpatent/JPS4719055Y1/ja
Priority to US3569930Dprioritypatent/US3569930A/en
Priority to GB1228449Dprioritypatent/GB1228449A/en
Priority to DE1780468Aprioritypatent/DE1780468C3/de
Priority to FR1580049Dprioritypatent/FR1580049A/fr
Publication of JPS4719055Y1publicationCriticalpatent/JPS4719055Y1/ja