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
CA732274A
Inventor
Sakurai Ryoichi
Nagano Shozaburo
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.)
Teijin Ltd
Original Assignee
Teikoku Jinzo Kenshi KK
Publication date
Application grantedgrantedCritical
Publication of CA732274ApublicationCriticalpatent/CA732274A/en