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发明名称
Duplex balance indicator
摘要
申请公布号
US2379866(A)
申请公布日期
1945.07.10
申请号
US19430494172
申请日期
1943.07.10
申请人
POSTAL TELEGRAPH-CABLE COMPANY
发明人
CONNERY ALDER F.
分类号
H04L5/14
主分类号
H04L5/14
代理机构
代理人
主权项
地址
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