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
CA823969A
Inventor
Mochida Yasunori
Ishimura Kazukiyo
Kurokawa Ikuji
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 Gakki Co Ltd
Original Assignee
Nippon Gakki Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA823969ApublicationCriticalpatent/CA823969A/en