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发明名称
Music chord indicator
摘要
申请公布号
US2824479(A)
申请公布日期
1958.02.25
申请号
US19540445531
申请日期
1954.07.26
申请人
DEROSA THOMAS E
发明人
DEROSA THOMAS E.
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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