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发明名称
Fingering attachment for stringed musical instruments
摘要
申请公布号
US2117628(A)
申请公布日期
1938.05.17
申请号
US19350025245
申请日期
1935.06.06
申请人
RICHMAN JONAS J
发明人
RICHMAN JONAS J.
分类号
G10D3/08
主分类号
G10D3/08
代理机构
代理人
主权项
地址
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