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发明名称
System of communication
摘要
申请公布号
US2380894(A)
申请公布日期
1945.07.31
申请号
US19280319047
申请日期
1928.11.13
申请人
BARBER-COLMAN COMPANY
发明人
COLMAN HOWARD D.
分类号
H04L13/08
主分类号
H04L13/08
代理机构
代理人
主权项
地址
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