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.)
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.)
Yamaha Corp
Original Assignee
Yamaha Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yamaha CorpfiledCriticalYamaha Corp
Priority to JP8250680ApriorityCriticalpatent/JPS578597A/ja
Priority to US06/267,688prioritypatent/US4402244A/en
Priority to DE3121253Aprioritypatent/DE3121253C2/de
Publication of JPS578597ApublicationCriticalpatent/JPS578597A/ja
Priority to US06/520,177prioritypatent/US4484507A/en
Publication of JPH0234040B2publicationCriticalpatent/JPH0234040B2/ja