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经营范围
发明名称
Noise reducing system
摘要
申请公布号
US2233283(A)
申请公布日期
1941.02.25
申请号
US19390253908
申请日期
1939.01.31
申请人
RADIO CORPORATION OF AMERICA
发明人
CARLSON WENDELL L.;LANDON VERNON D.
分类号
H04B1/12
主分类号
H04B1/12
代理机构
代理人
主权项
地址
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