Vacuum tube electrode element,申请号US19490078233-传众专利搜索

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发明名称	Vacuum tube electrode element
摘要
申请公布号	US2586768(A)	申请公布日期	1952.02.26
申请号	US19490078233	申请日期	1949.02.24
申请人	DRIVER-HARRIS COMPANY	发明人	BASH FRANCIS E.
分类号	H01J1/14;H01J19/30	主分类号	H01J1/14
代理机构		代理人
主权项
地址

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