Concentric conducting system,申请号US19290365522-传众专利搜索

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发明名称	Concentric conducting system
摘要
申请公布号	US1781092(A)	申请公布日期	1930.11.11
申请号	US19290365522	申请日期	1929.05.23
申请人	AMERICAN TELEPHONE AND TELEGRAPH COMPANY	发明人	AFFEL HERMAN A.;GREEN ESTILL I.
分类号	H01B11/18	主分类号	H01B11/18
代理机构		代理人
主权项
地址

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