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发明名称
Musicians keyboard displayer pedagogic device
摘要
申请公布号
SE0003735(D0)
申请公布日期
2000.10.16
申请号
SE20000003735
申请日期
2000.10.16
申请人
OTTO SPERLING
发明人
OTTO *SPERLING
分类号
G09B;G09B15/00;G10G1/02;(IPC1-7):G09B/
主分类号
G09B
代理机构
代理人
主权项
地址
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