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
CA822747A
Inventor
Tsuruta Masaki
Watanabe Hiroshi
Baba Shigeru
Hara Junji
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.)
Toyo Koatsu Industries Inc
Original Assignee
Toyo Koatsu Industries Inc
Publication date
Application grantedgrantedCritical
Publication of CA822747ApublicationCriticalpatent/CA822747A/en