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.)
Expired
Application number
CA773051A
Inventor
Maehara Shigeru
Igarashi Isoji
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.)
YOKOYAMA ENGINEERING Co
Yawata Iron and Steel Co Ltd
Original Assignee
YOKOYAMA ENGINEERING Co
Yawata Iron and Steel Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA773051ApublicationCriticalpatent/CA773051A/en