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 JP19123080UpriorityCriticalpatent/JPS6211719Y2/ja
Priority to US06/273,493prioritypatent/US4401347A/en
Priority to DE8181105153Tprioritypatent/DE3172430D1/de
Priority to EP81105153Aprioritypatent/EP0053651B1/en
Publication of JPS57111654UpublicationCriticalpatent/JPS57111654U/ja
Application grantedgrantedCritical
Publication of JPS6211719Y2publicationCriticalpatent/JPS6211719Y2/ja