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.)
Filing date
Publication date
Priority claimed from US845020Aexternal-prioritypatent/US2993114A/en
Application filedfiledCritical
Priority to JP4056160ApriorityCriticalpatent/JPS3820072B1/ja
Publication of JPS3820072B1publicationCriticalpatent/JPS3820072B1/ja