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发明名称
Piano action
摘要
申请公布号
US2501529(A)
申请公布日期
1950.03.21
申请号
US19460640175
申请日期
1946.01.10
申请人
MARKLEY JAY G
发明人
MARKLEY JAY G.
分类号
G10C3/16
主分类号
G10C3/16
代理机构
代理人
主权项
地址
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