Improvements in or relating to electron emitting cathodes and methods of manufacturing the same,申请号GB19310032948-传众专利搜索

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发明名称	Improvements in or relating to electron emitting cathodes and methods of manufacturing the same
摘要
申请公布号	GB397836(A)	申请公布日期	1933.08.31
申请号	GB19310032948	申请日期	1931.11.27
申请人	TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M.B.H.	发明人
分类号	H01J9/04	主分类号	H01J9/04
代理机构		代理人
主权项
地址

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