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
CA676152A
Inventor
Akashi Tsuneo
Tobita Masao
Takahashi Masao
Takamizawa Hideo
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.)
NEC Corp
Original Assignee
Hideo Takamizawa
Masao Tobita
Tsuneo Akashi
Nippon Electric Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA676152ApublicationCriticalpatent/CA676152A/en