Improvements in electron discharge tubes,申请号GB19300006715-传众专利搜索

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发明名称	Improvements in electron discharge tubes
摘要
申请公布号	GB349608(A)	申请公布日期	1931.05.28
申请号	GB19300006715	申请日期	1930.02.28
申请人	WESTINGHOUSE ELECTRIC AND MANUFACTURING COMPANY	发明人
分类号	H01H37/54;H01J19/34;H01J21/02	主分类号	H01H37/54
代理机构		代理人
主权项
地址

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