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Priority to JP7468UpriorityCriticalpatent/JPS494899Y1/ja
Priority to GB59989/68Aprioritypatent/GB1245606A/en
Priority to US785610Aprioritypatent/US3565367A/en
Priority to BE726098Dprioritypatent/BE726098A/xx
Priority to DE19681817185prioritypatent/DE1817185A1/de
Priority to FR1603926Dprioritypatent/FR1603926A/fr
Priority to NL686818712Aprioritypatent/NL147562B/xx
Publication of JPS494899Y1publicationCriticalpatent/JPS494899Y1/ja