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
CA770809A
Inventor
Takahashi Tetsuji
Kamiya Katsuzo
Sato Isao
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.)
Nippon Communication Industrial Co Ltd
Original Assignee
Katsuzo Kamiya
Tetsuji Takahashi
Nippon Communication Industrial Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA770809ApublicationCriticalpatent/CA770809A/en