Improvements in electron discharge devices,申请号GB19430020312-传众专利搜索

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发明名称	Improvements in electron discharge devices
摘要
申请公布号	GB573232(A)	申请公布日期	1945.11.12
申请号	GB19430020312	申请日期	1943.12.04
申请人	WESTERN ELECTRIC COMPANY INCORPORATED	发明人
分类号	H01J17/54;H01J19/40	主分类号	H01J17/54
代理机构		代理人
主权项
地址

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