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发明名称
Artificial line network
摘要
申请公布号
US1809560(A)
申请公布日期
1931.06.09
申请号
US19290354573
申请日期
1929.04.12
申请人
THE WESTERN UNION TELEGRAPH COMPANY
发明人
MILNOR JOSEPH W.
分类号
H04B3/40
主分类号
H04B3/40
代理机构
代理人
主权项
地址
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