Electron discharge device,申请号GB19330035549-传众专利搜索

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发明名称	Electron discharge device
摘要
申请公布号	GB435383(A)	申请公布日期	1935.09.18
申请号	GB19330035549	申请日期	1933.12.18
申请人	HAZELTINE CORPORATION	发明人
分类号	H01J21/02	主分类号	H01J21/02
代理机构		代理人
主权项
地址

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