Improvements in or relating to electrode material for vacuum electric tube devices,申请号GB19290006428-传众专利搜索

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发明名称	Improvements in or relating to electrode material for vacuum electric tube devices
摘要
申请公布号	GB310920(A)	申请公布日期	1930.05.27
申请号	GB19290006428	申请日期	1929.02.27
申请人	WESTINGHOUSE ELECTRIC AND MANUFACTURING COMPANY	发明人
分类号	H01J19/00	主分类号	H01J19/00
代理机构		代理人
主权项
地址

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