Improvements in and relating to electronic valve devices,申请号GB19460022956-传众专利搜索

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发明名称	Improvements in and relating to electronic valve devices
摘要
申请公布号	GB625271(A)	申请公布日期	1949.06.24
申请号	GB19460022956	申请日期	1946.08.01
申请人	GILBERT HAROLD METSON	发明人
分类号	H01J25/78	主分类号	H01J25/78
代理机构		代理人
主权项
地址

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