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经营范围
发明名称
CRYPTOGRAPHIC COMMUNICATION SYSTEM
摘要
申请公布号
JPH0373633(A)
申请公布日期
1991.03.28
申请号
JP19890209787
申请日期
1989.08.14
申请人
NIPPON TELEGR & TELEPH CORP <NTT>
发明人
OTA KAZUO
分类号
H04L9/32
主分类号
H04L9/32
代理机构
代理人
主权项
地址
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