Electron ray tube,申请号US19340721578-传众专利搜索

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发明名称	Electron ray tube
摘要
申请公布号	US2159712(A)	申请公布日期	1939.05.23
申请号	US19340721578	申请日期	1934.04.20
申请人	THE FIRM FERNSEH A.-G.	发明人	SCHIFF LUDWIG
分类号	C25D7/04;F02F1/20;H01J29/58;H01J31/08;H01J31/12	主分类号	C25D7/04
代理机构		代理人
主权项
地址

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