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发明名称
SECURITY MODEM SYSTEM
摘要
申请公布号
JPH0313139(A)
申请公布日期
1991.01.22
申请号
JP19890148732
申请日期
1989.06.12
申请人
NEC CORP
发明人
MIZUKAMI TOSHIHIKO
分类号
H04M11/00;H04L9/16;H04L9/32
主分类号
H04M11/00
代理机构
代理人
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