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发明名称
Amplifying system
摘要
申请公布号
US2162986(A)
申请公布日期
1939.06.20
申请号
US19370167706
申请日期
1937.10.07
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
WIEBUSCH CHARLES F.
分类号
H03F1/36;H04R3/00
主分类号
H03F1/36
代理机构
代理人
主权项
地址
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