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发明名称
Control circuits
摘要
申请公布号
US2021920(A)
申请公布日期
1935.11.26
申请号
US19350001882
申请日期
1935.01.15
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
NORWINE ANDREW C.
分类号
H04B1/64
主分类号
H04B1/64
代理机构
代理人
主权项
地址
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