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 JP810581UpriorityCriticalpatent/JPS57123148U/ja
Priority to CA000390392Aprioritypatent/CA1160318A/en
Priority to US06/324,487prioritypatent/US4370300A/en
Publication of JPS57123148UpublicationCriticalpatent/JPS57123148U/ja