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 JP2791381UpriorityCriticalpatent/JPH0218512Y2/ja
Priority to US06/326,678prioritypatent/US4409445A/en
Priority to DE8181110254Tprioritypatent/DE3172786D1/de
Priority to EP81110254Aprioritypatent/EP0054833B1/en
Publication of JPS57140042UpublicationCriticalpatent/JPS57140042U/ja
Application grantedgrantedCritical
Publication of JPH0218512Y2publicationCriticalpatent/JPH0218512Y2/ja