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 JP14976987UpriorityCriticalpatent/JPS6452901U/ja
Priority to US07/215,769prioritypatent/US4917441A/en
Priority to DE8888111150Tprioritypatent/DE3880751T2/de
Priority to EP88111150Aprioritypatent/EP0300333B1/en
Publication of JPS6452901UpublicationCriticalpatent/JPS6452901U/ja