Electron discharge apparatus,申请号US19390289428-传众专利搜索

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发明名称	Electron discharge apparatus
摘要
申请公布号	US2234720(A)	申请公布日期	1941.03.11
申请号	US19390289428	申请日期	1939.08.10
申请人	GENERAL ELECTRIC COMPANY	发明人	TAR DONALD R. DE
分类号	H01J29/54	主分类号	H01J29/54
代理机构		代理人
主权项
地址

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