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发明名称
Systèmes télégraphiques
摘要
申请公布号
FR947133(A)
申请公布日期
1949.06.23
申请号
FRD947133
申请日期
1947.04.30
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
VERNAM GILBERT SANFORD
分类号
H04J3/16;H04L5/22;H04L12/52
主分类号
H04J3/16
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代理人
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