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发明名称
Repeater switching apparatus
摘要
申请公布号
US2683188(A)
申请公布日期
1954.07.06
申请号
US19510261512
申请日期
1951.12.13
申请人
THE WESTERN UNION TELEGRAPH COMPANY
发明人
CANNON WILLIAM D.;NEWELL EARL L.;CRAMER CLIFFORD H.
分类号
H04B1/74
主分类号
H04B1/74
代理机构
代理人
主权项
地址
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