Process of making electron discharge devices,申请号US19260130769-传众专利搜索

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发明名称	Process of making electron discharge devices
摘要
申请公布号	US1875058(A)	申请公布日期	1932.08.30
申请号	US19260130769	申请日期	1926.08.21
申请人	RADIO CORPORATION	发明人	LOEWE SIEGMUND
分类号	H01J9/14	主分类号	H01J9/14
代理机构		代理人
主权项
地址

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