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Priority to JP4772167ApriorityCriticalpatent/JPS521299B1/ja
Priority to DE19681772913prioritypatent/DE1772913C2/de
Priority to FR1588846Dprioritypatent/FR1588846A/fr
Priority to BE718499Dprioritypatent/BE718499A/xx
Priority to US747480Aprioritypatent/US3556800A/en
Priority to GB35662/68Aprioritypatent/GB1210009A/en
Publication of JPS521299B1publicationCriticalpatent/JPS521299B1/ja