Improvements in or relating to electrical signalling systems,申请号GB19340029292-传众专利搜索

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发明名称	Improvements in or relating to electrical signalling systems
摘要
申请公布号	GB445580(A)	申请公布日期	1936.04.14
申请号	GB19340029292	申请日期	1934.10.12
申请人	AUTOMATIC ELECTRIC COMPANY LIMITED;SAM BOLSHAW	发明人
分类号	H04Q1/446	主分类号	H04Q1/446
代理机构		代理人
主权项
地址

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