RINGING SIGNAL DETECTOR CIRCUIT,申请号CA19740206559-传众专利搜索

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发明名称	RINGING SIGNAL DETECTOR CIRCUIT
摘要
申请公布号	CA1003139(A)	申请公布日期	1977.01.04
申请号	CA19740206559	申请日期	1974.08.08
申请人	GTE AUTOMATIC ELECTRIC LABORATORIES INCORPORATED	发明人	KOPEC, THOMAS J.;MORSTADT, RICHARD A.
分类号	H04M19/04	主分类号	H04M19/04
代理机构		代理人
主权项
地址

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