Improvements in vacuum tube apparatus,申请号GB19400002694-传众专利搜索

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发明名称	Improvements in vacuum tube apparatus
摘要
申请公布号	GB545693(A)	申请公布日期	1942.06.09
申请号	GB19400002694	申请日期	1940.02.12
申请人	MACHLETT LABORATORIES, INCORPORATED	发明人
分类号	H01J35/10	主分类号	H01J35/10
代理机构		代理人
主权项
地址

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