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发明名称
Telegraph exchange system
摘要
申请公布号
US1927692(A)
申请公布日期
1933.09.19
申请号
US19310538981
申请日期
1931.05.21
申请人
INTERNATIONAL COMMUNICATIONS LABORATORIES, INC.
发明人
VERNAM GILBERT S.
分类号
H04L12/12
主分类号
H04L12/12
代理机构
代理人
主权项
地址
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