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发明名称
Signal-control system
摘要
申请公布号
US1779585(A)
申请公布日期
1930.10.28
申请号
US19280265006
申请日期
1928.03.27
申请人
FEDERAL TELEGRAPH COMPANY
发明人
CATTELL GILBERT W.
分类号
H04L27/04
主分类号
H04L27/04
代理机构
代理人
主权项
地址
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