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
CA898965A
Inventor
Yamamoto Hiroshi
Nakatani Taro
Nishimoto Masaki
Segawa Hiromi
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.)
Toa Tokushu Denki KK
Original Assignee
Toa Tokushu Denki KK
Publication date
Application grantedgrantedCritical
Publication of CA898965ApublicationCriticalpatent/CA898965A/en