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发明名称
Carrier telegraph system
摘要
申请公布号
US2304017(A)
申请公布日期
1942.12.01
申请号
US19410404479
申请日期
1941.07.29
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
PHELPS WALTER A.
分类号
H04L5/06
主分类号
H04L5/06
代理机构
代理人
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