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发明名称
BASS REGISTER KEYING SYSTEM
摘要
申请公布号
US3470306(A)
申请公布日期
1969.09.30
申请号
USD3470306
申请日期
1965.07.01
申请人
D.H. BALDWIN CO.
发明人
GEORGE H. HADDEN
分类号
G10H1/22;G10H1/38;(IPC1-7):G10H1/06
主分类号
G10H1/22
代理机构
代理人
主权项
地址
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