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经营范围
发明名称
DTMF SIGNAL GENERATION CIRCUIT
摘要
申请公布号
JPH05176043(A)
申请公布日期
1993.07.13
申请号
JP19910343609
申请日期
1991.12.25
申请人
OKI ELECTRIC IND CO LTD
发明人
IIOKA MASAYUKI
分类号
H04M1/50;H04Q1/45
主分类号
H04M1/50
代理机构
代理人
主权项
地址
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