Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of FR222560ApublicationCriticalpatent/FR222560A/fr
Priority claimed from JP1968097517Uexternal-prioritypatent/JPS472552Y1/ja