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发明名称
Piano
摘要
申请公布号
US2195624(A)
申请公布日期
1940.04.02
申请号
US19380243712
申请日期
1938.12.03
申请人
W. W. KIMBALL COMPANY
发明人
HUSEBY ALBERT A.
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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