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经营范围
发明名称
COMMUNICATION SYSTEM
摘要
申请公布号
JPH0397339(A)
申请公布日期
1991.04.23
申请号
JP19890232776
申请日期
1989.09.11
申请人
HITACHI LTD
发明人
AKIYAMA HIDEHIRO
分类号
H04L29/04;H04L29/08
主分类号
H04L29/04
代理机构
代理人
主权项
地址
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