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发明名称
Music-instruction device
摘要
申请公布号
US1783361(A)
申请公布日期
1930.12.02
申请号
US19270190914
申请日期
1927.05.12
申请人
DWIGHT GIBSON GEORGE HERBERT
发明人
GIBSON GEORGE HERBERT DWIGHT
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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