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发明名称
Telegraph system
摘要
申请公布号
US2266451(A)
申请公布日期
1941.12.16
申请号
US19390264071
申请日期
1939.03.25
申请人
POSTAL TELEGRAPH-CABLE COMPANY
发明人
VERNAM GILBERT S.
分类号
H04J3/16;H04L5/22;H04L12/52
主分类号
H04J3/16
代理机构
代理人
主权项
地址
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