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发明名称
Sound-reproducing machine
摘要
申请公布号
US1762247(A)
申请公布日期
1930.06.10
申请号
US19230631764
申请日期
1923.04.13
申请人
RADIO CORPORATION
发明人
SHAPIRO LAZARUS
分类号
H04R11/08
主分类号
H04R11/08
代理机构
代理人
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