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
CA822708A
Inventor
Kumamaru Kaoru
Ishikawa Nobuo
Matsumoto Nobutoshi
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 CA822708ApublicationCriticalpatent/CA822708A/en