Improvements in or relating to focussing systems for use in electric discharge tubes,申请号GB19370011003-传众专利搜索

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发明名称	Improvements in or relating to focussing systems for use in electric discharge tubes
摘要
申请公布号	GB495707(A)	申请公布日期	1938.11.17
申请号	GB19370011003	申请日期	1937.04.17
申请人	FREDERICK HERMES NICOLL	发明人
分类号	H01J29/62;H01J35/14	主分类号	H01J29/62
代理机构		代理人
主权项
地址

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