Electrical testing system,申请号US19370151406-传众专利搜索

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发明名称	Electrical testing system
摘要
申请公布号	US2181560(A)	申请公布日期	1939.11.28
申请号	US19370151406	申请日期	1937.07.01
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	BLOUNT FRANK E.
分类号	H04M3/30	主分类号	H04M3/30
代理机构		代理人
主权项
地址

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