Improvements in or relating to telegraph systems,申请号GB19310005879-传众专利搜索

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发明名称	Improvements in or relating to telegraph systems
摘要
申请公布号	GB372852(A)	申请公布日期	1932.05.19
申请号	GB19310005879	申请日期	1931.02.25
申请人	COVENTRY AUTOMATIC TELEPHONES LIMITED;DOUGLAS AUBREY LEY	发明人
分类号	H04L5/24	主分类号	H04L5/24
代理机构		代理人
主权项
地址

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