Electron discharge device,申请号US19390275408-传众专利搜索

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发明名称	Electron discharge device
摘要
申请公布号	US2228978(A)	申请公布日期	1941.01.14
申请号	US19390275408	申请日期	1939.05.24
申请人	RADIO CORPORATION	发明人	SCHADE OTTO H.
分类号	H01J19/38	主分类号	H01J19/38
代理机构		代理人
主权项
地址

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