RINGER SIGNAL DETECTION CIRCUIT,申请号JP19900035440-传众专利搜索

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发明名称	RINGER SIGNAL DETECTION CIRCUIT
摘要
申请公布号	JPH03238955(A)	申请公布日期	1991.10.24
申请号	JP19900035440	申请日期	1990.02.15
申请人	NEC CORP;NEC SHIZUOKA LTD	发明人	SAKAMOTO YOSHITAKA;NITTA KATSUNORI
分类号	H04M1/00;(IPC1-7):H04M1/00	主分类号	H04M1/00
代理机构		代理人
主权项
地址

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