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
CA910413A
Inventor
Nishikawa Toshiro
Uemura Saburo
Umezawa Yasuo
Yamada Toshiyuki
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.)
Sony Corp
Original Assignee
Sony Corp
Publication date
Application grantedgrantedCritical
Publication of CA910413ApublicationCriticalpatent/CA910413A/en