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经营范围
发明名称
INCOMING CALL CIRCUIT DURING TALKING
摘要
申请公布号
JPH05236134(A)
申请公布日期
1993.09.10
申请号
JP19920033595
申请日期
1992.02.20
申请人
NEC CORP
发明人
ISHIZU WATARU;OKASHITA KAZUHIRO
分类号
H04M3/20;H04M3/42;H04M3/58;(IPC1-7):H04M3/58
主分类号
H04M3/20
代理机构
代理人
主权项
地址
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