Automatic telephone system,申请号US19440517496-传众专利搜索

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发明名称	Automatic telephone system
摘要
申请公布号	US2364146(A)	申请公布日期	1944.12.05
申请号	US19440517496	申请日期	1944.01.08
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	JR. AMOS E. JOEL,
分类号	H04Q3/00	主分类号	H04Q3/00
代理机构		代理人
主权项
地址

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