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发明名称
Musical instrument
摘要
申请公布号
US2263973(A)
申请公布日期
1941.11.25
申请号
US19410390441
申请日期
1941.04.26
申请人
O'BRIEN DANIEL P
发明人
O'BRIEN DANIEL P.
分类号
G10D13/08
主分类号
G10D13/08
代理机构
代理人
主权项
地址
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