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
CA605404A
Inventor
Izumi Michimasa
Nakanishi Michio
Nishino Takashi
Tsunoda Masaichi
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.)
Welfide Corp
Original Assignee
Welfide Corp
Publication date
Application grantedgrantedCritical
Publication of CA605404ApublicationCriticalpatent/CA605404A/en