Electrical switching system,申请号US19450602823-传众专利搜索

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发明名称	Electrical switching system
摘要
申请公布号	US2576137(A)	申请公布日期	1951.11.27
申请号	US19450602823	申请日期	1945.07.02
申请人	FEDERAL TELEPHONE AND RADIO CORPORATION	发明人	NEWITT JOHN H.
分类号	H03D1/16;H03K17/54	主分类号	H03D1/16
代理机构		代理人
主权项
地址

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