Remote multiple observation bridge system, especially for observing telephone traffic,申请号US19460708554-传众专利搜索

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发明名称	Remote multiple observation bridge system, especially for observing telephone traffic
摘要
申请公布号	US2522758(A)	申请公布日期	1950.09.19
申请号	US19460708554	申请日期	1946.11.08
申请人	LOUIS LESIGNE HENRI	发明人	LESIGNE HENRI LOUIS
分类号	H04M3/36;H04Q1/18	主分类号	H04M3/36
代理机构		代理人
主权项
地址

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