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发明名称
PUSH-BUTTON DIAL SIGNAL DETECTING SYSTEM
摘要
申请公布号
JPH01284197(A)
申请公布日期
1989.11.15
申请号
JP19880115861
申请日期
1988.05.11
申请人
NEC CORP
发明人
KIMURA JUNICHI
分类号
H04Q1/457
主分类号
H04Q1/457
代理机构
代理人
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地址
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