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发明名称
Sound reproducing system
摘要
申请公布号
US2008706(A)
申请公布日期
1935.07.23
申请号
US19310510384
申请日期
1931.01.22
申请人
HAMMOND
发明人
JR. JOHN HAYS HAMMOND,;PURINGTON ELLISON S.
分类号
H03G7/02
主分类号
H03G7/02
代理机构
代理人
主权项
地址
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