Improvements in electrical selective signalling systems,申请号GB19390000998-传众专利搜索

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发明名称	Improvements in electrical selective signalling systems
摘要
申请公布号	GB523640(A)	申请公布日期	1940.07.18
申请号	GB19390000998	申请日期	1939.01.11
申请人	AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED;ALFRED PERCY BAILEY RENSHAW	发明人
分类号	H01J31/06	主分类号	H01J31/06
代理机构		代理人
主权项
地址

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