Improvements in or relating to devices of the kind comprising a discharge tube in which the electrons are concentrated in a beam and traverse a velocity control space,申请号GB19410014787-传众专利搜索

发明名称	Improvements in or relating to devices of the kind comprising a discharge tube in which the electrons are concentrated in a beam and traverse a velocity control space
摘要
申请公布号	GB556211(A)	申请公布日期	1943.09.24
申请号	GB19410014787	申请日期	1941.11.17
申请人	N.V. PHILIPS' GLOEILAMPENFABRIEKEN	发明人
分类号	H01J25/16	主分类号	H01J25/16
代理机构		代理人
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