Travelling wave tubes,申请号GB19570020928-传众专利搜索

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发明名称	Travelling wave tubes
摘要
申请公布号	GB868853(A)	申请公布日期	1961.05.25
申请号	GB19570020928	申请日期	1957.07.02
申请人	RADIO CORPORATION OF AMERICA	发明人
分类号	H01J25/36;H01J25/44	主分类号	H01J25/36
代理机构		代理人
主权项
地址

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