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.)
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Publication date
Priority claimed from JP1194548Aexternal-prioritypatent/JPH03220218A/en
Priority claimed from JP1192708Aexternal-prioritypatent/JPH0721714B2/en
Application filed by Yamaha CorpfiledCriticalYamaha Corp
Publication of HK188296ApublicationCriticalpatent/HK188296A/en