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发明名称
Substation rectification of carrier telegraph currents
摘要
申请公布号
US1779495(A)
申请公布日期
1930.10.28
申请号
US19280291418
申请日期
1928.07.09
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
ROBERTS LELAND C.
分类号
H04L27/02
主分类号
H04L27/02
代理机构
代理人
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