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经营范围
发明名称
Ground potential compensator
摘要
申请公布号
US2199558(A)
申请公布日期
1940.05.07
申请号
US19390266666
申请日期
1939.04.07
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
CUMMINGS GEORGE C.
分类号
H04B3/00;H04L25/08
主分类号
H04B3/00
代理机构
代理人
主权项
地址
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