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发明名称
Music teaching device
摘要
申请公布号
US3280687(A)
申请公布日期
1966.10.25
申请号
US19650459514
申请日期
1965.05.13
申请人
ERICKSEN HELEN H
发明人
ERICKSEN HELEN H.
分类号
G10G1/02
主分类号
G10G1/02
代理机构
代理人
主权项
地址
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