ELECTRONIC RINGING FREQUENCY GENERATOR,申请号CAD571080-传众专利搜索

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发明名称	ELECTRONIC RINGING FREQUENCY GENERATOR
摘要
申请公布号	CA571080(A)	申请公布日期	1959.02.24
申请号	CAD571080	申请日期
申请人	GENERAL TELEPHONE LABORATORIES	发明人	HAROLD J. MCCREARY
分类号		主分类号
代理机构		代理人
主权项
地址

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