Automatic telephone system,申请号US19530368066-传众专利搜索

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发明名称	Automatic telephone system
摘要
申请公布号	US2905764(A)	申请公布日期	1959.09.22
申请号	US19530368066	申请日期	1953.07.15
申请人	NORTH ELECTRIC COMPANY	发明人	BLASHFIELD WILLIAM H.;CALLENDER JACK E.;HARRIS BEN A.
分类号	H04M15/38	主分类号	H04M15/38
代理机构		代理人
主权项
地址

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