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发明名称
Automatic bias eliminator
摘要
申请公布号
US2017977(A)
申请公布日期
1935.10.22
申请号
US19320639520
申请日期
1932.10.25
申请人
AMERICAN TELEPHONE & TELEGRAPH COMPANY
发明人
LADNER HENRY
分类号
H04L27/08
主分类号
H04L27/08
代理机构
代理人
主权项
地址
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