Test board for telephone systems,申请号US19510208471-传众专利搜索

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发明名称	Test board for telephone systems
摘要
申请公布号	US2617897(A)	申请公布日期	1952.11.11
申请号	US19510208471	申请日期	1951.01.30
申请人	AUTOMATIC ELECTRIC LABORATORIES, INC.	发明人	KESSLER FRANK
分类号	H04M3/28	主分类号	H04M3/28
代理机构		代理人
主权项
地址

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