Improvements in or relating to electron-discharge devices,申请号GB19390015597-传众专利搜索

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发明名称	Improvements in or relating to electron-discharge devices
摘要
申请公布号	GB531821(A)	申请公布日期	1941.01.13
申请号	GB19390015597	申请日期	1939.05.25
申请人	FRANCOIS JOSEPH GERARD VAN DEN BOSCH;VACUUM-SCIENCE PRODUCTS LIMITED	发明人
分类号	H01J43/04;H03D7/10	主分类号	H01J43/04
代理机构		代理人
主权项
地址

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