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
CA816314A
Inventor
Hirokawa Yoichi
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.)
Tokyo Keiki Inc
Original Assignee
Tokyo Keiki Seizosho Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA816314ApublicationCriticalpatent/CA816314A/en