Improvements relating to electron-discharge devices,申请号GB19460019479-传众专利搜索

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发明名称	Improvements relating to electron-discharge devices
摘要
申请公布号	GB615934(A)	申请公布日期	1949.01.13
申请号	GB19460019479	申请日期	1946.06.29
申请人	ALFRED SOMMER	发明人
分类号	H01J40/06	主分类号	H01J40/06
代理机构		代理人
主权项
地址

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