Improvements in or relating to vacuum tube devices,申请号GB19300004331-传众专利搜索

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发明名称	Improvements in or relating to vacuum tube devices
摘要
申请公布号	GB354737(A)	申请公布日期	1931.08.10
申请号	GB19300004331	申请日期	1930.02.08
申请人	ARCTURUS RADIO TUBE COMPANY	发明人
分类号	H01J19/02	主分类号	H01J19/02
代理机构		代理人
主权项
地址

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