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发明名称
MULTIPLE KEY SWITCH FOR MUSICAL INSTRUMENTS
摘要
申请公布号
CA384065(A)
申请公布日期
1939.09.19
申请号
CAD384065
申请日期
申请人
LAURENS HAMMOND
发明人
LAURENS HAMMOND
分类号
主分类号
代理机构
代理人
主权项
地址
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