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发明名称
Teletypewriter secrecy system
摘要
申请公布号
US2401474(A)
申请公布日期
1946.06.04
申请号
US19430479405
申请日期
1943.03.17
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
GAMMELL ERNEST OSMOND
分类号
H04L9/38
主分类号
H04L9/38
代理机构
代理人
主权项
地址
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