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
CA625291A
Inventor
Namikawa Mamoru
Sato Minoru
Hoshino Yasushi
Tochihara Shigezo
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.)
TDK Corp
Original Assignee
TDK Corp
Publication date
Application grantedgrantedCritical
Publication of CA625291ApublicationCriticalpatent/CA625291A/en