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
Application filedfiledCritical
Priority to JP1977048873UpriorityCriticalpatent/JPS581837Y2/ja
Priority to US05/897,405prioritypatent/US4211139A/en
Priority to DE2817068Aprioritypatent/DE2817068C2/de
Publication of JPS53144325UpublicationCriticalpatent/JPS53144325U/ja
Application grantedgrantedCritical
Publication of JPS581837Y2publicationCriticalpatent/JPS581837Y2/ja