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
CA869667A
Inventor
Someya Akira
Hanada Teizo
Hashimoto Tsunekazu
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA869667ApublicationCriticalpatent/CA869667A/en