RINGER SIGNAL DETECTING CIRCUIT,申请号JP19890140340-传众专利搜索

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发明名称	RINGER SIGNAL DETECTING CIRCUIT
摘要
申请公布号	JPH036157(A)	申请公布日期	1991.01.11
申请号	JP19890140340	申请日期	1989.06.01
申请人	NEC CORP;NEC MIYAGI LTD	发明人	MURAKAMI MASATO;TAKAHASHI HIROYUKI
分类号	H03K5/19;H04M1/00	主分类号	H03K5/19
代理机构		代理人
主权项
地址

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