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发明名称
Keyboard for musical instruments
摘要
申请公布号
GB499370(A)
申请公布日期
1939.01.20
申请号
GB19380030244
申请日期
1937.04.20
申请人
LAURENS HAMMOND
发明人
分类号
G10C3/12
主分类号
G10C3/12
代理机构
代理人
主权项
地址
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