Electronic vacuum tube,申请号US19290417617-传众专利搜索

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发明名称	Electronic vacuum tube
摘要
申请公布号	US2064865(A)	申请公布日期	1936.12.22
申请号	US19290417617	申请日期	1929.12.31
申请人	RADIO CORPORATION OF AMERICA	发明人	THOMAS ADOLPH A.
分类号	H01J21/20	主分类号	H01J21/20
代理机构		代理人
主权项
地址

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