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发明名称
Private line communication system
摘要
申请公布号
US2740106(A)
申请公布日期
1956.03.27
申请号
US19540464822
申请日期
1954.10.26
申请人
SPERRY RAND CORPORATION
发明人
PHELPS RICHARD J.
分类号
H04L1/14;H04W88/18
主分类号
H04L1/14
代理机构
代理人
主权项
地址
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