Improvements in or relating to telegraph systems,申请号GB19400007801-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	GB540839(A)	申请公布日期	1941.10.31
申请号	GB19400007801	申请日期	1940.04.30
申请人	STANDARD TELEPHONES AND CABLES LIMITED;CHARLES WILLIAM EARP	发明人
分类号	H04L1/00;H04L27/14	主分类号	H04L1/00
代理机构		代理人
主权项
地址

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