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
CA742811A
Inventor
Sato Isuke
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.)
NIKKEN SANGYO KK
Original Assignee
NIKKEN SANGYO KK
Publication date
Application grantedgrantedCritical
Publication of CA742811ApublicationCriticalpatent/CA742811A/en