Improvements in or relating to electron discharge devices,申请号GB19540037546-传众专利搜索

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发明名称	Improvements in or relating to electron discharge devices
摘要
申请公布号	GB755819(A)	申请公布日期	1956.08.29
申请号	GB19540037546	申请日期	1954.12.29
申请人	THE RAULAND CORPORATION	发明人
分类号	H01J29/94;H01J31/12	主分类号	H01J29/94
代理机构		代理人
主权项
地址

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