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经营范围
发明名称
Improvements in electric discharge tubes
摘要
申请公布号
GB482557(A)
申请公布日期
1938.03.31
申请号
GB19370015995
申请日期
1937.06.09
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
G03D13/06;H01F19/04;H01J21/02;H01J25/52
主分类号
G03D13/06
代理机构
代理人
主权项
地址
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