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
CA887583A
Inventor
Taira Toshio
Yumiki Keiichi
Hoshino Shoichiro
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.)
Keuffel and Esser Co
Original Assignee
Keuffel and Esser Co
Publication date
Application grantedgrantedCritical
Publication of CA887583ApublicationCriticalpatent/CA887583A/en