Improvements in or relating to tuning devices for electron-discharge tubes,申请号GB19480008239-传众专利搜索

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发明名称	Improvements in or relating to tuning devices for electron-discharge tubes
摘要
申请公布号	GB652758(A)	申请公布日期	1951.05.02
申请号	GB19480008239	申请日期	1948.03.19
申请人	THE SPERRY CORPORATION	发明人
分类号	H01J23/213;H01J25/12;H01P7/06	主分类号	H01J23/213
代理机构		代理人
主权项
地址

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