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发明名称
Multiplex communication signaling system
摘要
申请公布号
US2082877(A)
申请公布日期
1937.06.08
申请号
US19320638948
申请日期
1932.10.21
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
DURAND SAMUEL RELF
分类号
H04L5/02
主分类号
H04L5/02
代理机构
代理人
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地址
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