Apparatus for detecting malfunctions in telegraph systems,申请号US19570640560-传众专利搜索

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发明名称	Apparatus for detecting malfunctions in telegraph systems
摘要
申请公布号	US2951120(A)	申请公布日期	1960.08.30
申请号	US19570640560	申请日期	1957.02.15
申请人	DINGLEY JR EDWARD NELSON	发明人	JR. EDWARD NELSON DINGLEY,
分类号	H04L9/18	主分类号	H04L9/18
代理机构		代理人
主权项
地址

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