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.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Proterial Ltd
Original Assignee
Hitachi Metals Ltd
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
Priority claimed from JP5462573Aexternal-prioritypatent/JPS5439906B2/ja
Priority claimed from JP8058873Aexternal-prioritypatent/JPS545501B2/ja
Priority claimed from JP8092573Aexternal-prioritypatent/JPS583366B2/ja
Priority claimed from JP8092473Aexternal-prioritypatent/JPS5030047A/ja
Priority claimed from JP1206074Aexternal-prioritypatent/JPS50107437A/ja
Priority claimed from JP1974020817Uexternal-prioritypatent/JPS558888Y2/ja
Priority claimed from CA203,848Aexternal-prioritypatent/CA1014629A/en
Application filed by Hitachi Metals LtdfiledCriticalHitachi Metals Ltd
Priority to CA267,443ApriorityCriticalpatent/CA1017818A/fr
Application grantedgrantedCritical
Publication of CA1017818ApublicationCriticalpatent/CA1017818A/fr