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发明名称
Signal transmission system
摘要
申请公布号
US2153040(A)
申请公布日期
1939.04.04
申请号
US19370182442
申请日期
1937.12.30
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
DICKIESON ALTON C.;FISHER HAROLD J.
分类号
H04B3/20
主分类号
H04B3/20
代理机构
代理人
主权项
地址
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