An improved cathode for electron tubes,申请号GB19610012414-传众专利搜索

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发明名称	An improved cathode for electron tubes
摘要
申请公布号	GB918089(A)	申请公布日期	1963.02.13
申请号	GB19610012414	申请日期	1961.04.06
申请人	SYLVANIA ELECTRIC PRODUCTS INC.	发明人
分类号	H01J1/20	主分类号	H01J1/20
代理机构		代理人
主权项
地址

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