Tubular cathode for electron discharge devices,申请号US19360067006-传众专利搜索

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发明名称	Tubular cathode for electron discharge devices
摘要
申请公布号	US2123686(A)	申请公布日期	1938.07.12
申请号	US19360067006	申请日期	1936.03.04
申请人	METALS & CONTROLS CORPORATION	发明人	SPENCER JOHN A.
分类号	H01J1/26	主分类号	H01J1/26
代理机构		代理人
主权项
地址

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