Electronic switching system,申请号US19370139214-传众专利搜索

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发明名称	Electronic switching system
摘要
申请公布号	US2146862(A)	申请公布日期	1939.02.14
申请号	US19370139214	申请日期	1937.04.27
申请人	RADIO CORPORATION	发明人	SHUMARD CHARLES C.
分类号	G01R13/28	主分类号	G01R13/28
代理机构		代理人
主权项
地址

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