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发明名称
Tuning device for pianofortes
摘要
申请公布号
US2469738(A)
申请公布日期
1949.05.10
申请号
US19460670074
申请日期
1946.05.16
申请人
JOHN MEISZNER
发明人
MEISZNER JOHN
分类号
G10C3/10
主分类号
G10C3/10
代理机构
代理人
主权项
地址
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