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发明名称
Means for forming cryptographic messages
摘要
申请公布号
US2232575(A)
申请公布日期
1941.02.18
申请号
US19380215048
申请日期
1938.06.21
申请人
WALKER JOSEPH B;JOHNSON SHELDON K
发明人
WALKER JOSEPH B.;JOHNSON SHELDON K.
分类号
G09C1/14
主分类号
G09C1/14
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代理人
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地址
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