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发明名称
Sound reproducing apparatus
摘要
申请公布号
US2094246(A)
申请公布日期
1937.09.28
申请号
US19350024204
申请日期
1935.05.31
申请人
RADIO CORPORATION
发明人
SUOMALA JOHN B.
分类号
G11B3/00;G11B17/00;G11B25/04;G11B31/00
主分类号
G11B3/00
代理机构
代理人
主权项
地址
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