Electron discharge tube,申请号US19310547298-传众专利搜索

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发明名称	Electron discharge tube
摘要
申请公布号	US2018174(A)	申请公布日期	1935.10.22
申请号	US19310547298	申请日期	1931.06.27
申请人	THE SPARKS-WITHINGTON COMPANY	发明人	KAYKO CHARLES J.
分类号	H01J19/68	主分类号	H01J19/68
代理机构		代理人
主权项
地址

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