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发明名称
Sound producer
摘要
申请公布号
US2081619(A)
申请公布日期
1937.05.25
申请号
US19350027004
申请日期
1935.06.17
申请人
SIGNAL ENGINEERING & MANUFACTURING COMPANY
发明人
EBERT JOSEPH F.
分类号
G10K9/13
主分类号
G10K9/13
代理机构
代理人
主权项
地址
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