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发明名称
Music education device with tone generators corresponding to notes on a staff
摘要
申请公布号
US3394625(A)
申请公布日期
1968.07.30
申请号
US19660554118
申请日期
1966.05.31
申请人
HARLOW B. GROW
发明人
GROW HARLOW B.
分类号
G09B15/04
主分类号
G09B15/04
代理机构
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