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发明名称
TONE RINGER DRIVER CIRCUIT
摘要
申请公布号
JPH0477041(A)
申请公布日期
1992.03.11
申请号
JP19900185344
申请日期
1990.07.16
申请人
NEC CORP
发明人
MUNAKATA KENJI
分类号
H04M1/00
主分类号
H04M1/00
代理机构
代理人
主权项
地址
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