ELECTRON DISCHARGE DEVICE STEM,申请号CAD379874-传众专利搜索

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发明名称	ELECTRON DISCHARGE DEVICE STEM
摘要
申请公布号	CA379874(A)	申请公布日期	1939.03.07
申请号	CAD379874	申请日期
申请人	RADIO CORPORATION OF AMERICA	发明人	GEORGE MCNEIL ROSE, JR.
分类号		主分类号
代理机构		代理人
主权项
地址

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