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发明名称
Sound reproducing means
摘要
申请公布号
US2224358(A)
申请公布日期
1940.12.10
申请号
US19390290616
申请日期
1939.08.17
申请人
SVERRE QUISLING
发明人
QUISLING SVERRE
分类号
G10H3/03;G11B11/00
主分类号
G10H3/03
代理机构
代理人
主权项
地址
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