Apparatus to detect changes of voltages,申请号US19450595513-传众专利搜索

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发明名称	Apparatus to detect changes of voltages
摘要
申请公布号	US2429072(A)	申请公布日期	1947.10.14
申请号	US19450595513	申请日期	1945.05.24
申请人	THE UNION SWITCH & SIGNAL COMPANY	发明人	PLACE WILLARD P.
分类号	G01P15/16	主分类号	G01P15/16
代理机构		代理人
主权项
地址

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