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经营范围
发明名称
Short wave system
摘要
申请公布号
US2152335(A)
申请公布日期
1939.03.28
申请号
US19350053136
申请日期
1935.12.06
申请人
RADIO CORPORATION OF AMERICA
发明人
TREVOR BERTRAM;GEORGE RALPH W.
分类号
H03B5/18
主分类号
H03B5/18
代理机构
代理人
主权项
地址
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