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
CA905875A
Inventor
Nagata Akio
Ando Takuji
Izumi Rokuro
Sakakibara Hideo
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 Jozo KK
Original Assignee
Toyo Jozo KK
Publication date
Application grantedgrantedCritical
Publication of CA905875ApublicationCriticalpatent/CA905875A/en