Relay automatic telephone system,申请号US19480036312-传众专利搜索

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发明名称	Relay automatic telephone system
摘要
申请公布号	US2546080(A)	申请公布日期	1951.03.20
申请号	US19480036312	申请日期	1948.07.01
申请人	AUTOMATIC ELECTRIC LABORATORIES, INC.	发明人	VOSS JOHN H.
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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