Electric discharge tube,申请号US19290409804-传众专利搜索

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发明名称	Electric discharge tube
摘要
申请公布号	US1859029(A)	申请公布日期	1932.05.17
申请号	US19290409804	申请日期	1929.11.26
申请人	RADIO CORPORATION	发明人	BOER JAN HENDRIK DE;GESSEL KAREL MARINUS VAN
分类号	H01J7/18	主分类号	H01J7/18
代理机构		代理人
主权项
地址

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