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发明名称
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摘要
申请公布号
US1995129(A)
申请公布日期
1935.03.19
申请号
US19310507862
申请日期
1931.01.10
申请人
RADIO CORPORATION
发明人
NEWILL EDWARD B.
分类号
H04B15/02
主分类号
H04B15/02
代理机构
代理人
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地址
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