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发明名称
PRIVACY TELEPHONE SYSTEM
摘要
申请公布号
JPS6454849(A)
申请公布日期
1989.03.02
申请号
JP19870211885
申请日期
1987.08.25
申请人
NEC CORP
发明人
SHIGEMOTO NAOHITO
分类号
H04M1/68
主分类号
H04M1/68
代理机构
代理人
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