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经营范围
发明名称
Noise suppression circuit
摘要
申请公布号
US1968460(A)
申请公布日期
1934.07.31
申请号
US19320649316
申请日期
1932.12.29
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
LLEWELLYN FREDERICK B.
分类号
H04B3/00
主分类号
H04B3/00
代理机构
代理人
主权项
地址
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