Electronic testing system,申请号US19490134106-传众专利搜索

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发明名称	Electronic testing system
摘要
申请公布号	US2697140(A)	申请公布日期	1954.12.14
申请号	US19490134106	申请日期	1949.12.20
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	CORNELL WARREN A.;HALL NATHAN I.;POWELL HAROLD E.
分类号	H04M3/32	主分类号	H04M3/32
代理机构		代理人
主权项
地址

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