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经营范围
发明名称
Improvements in or relating to devices comprising an electric discharge tube containing vapour of difficultly volatilisable metal
摘要
申请公布号
GB427077(A)
申请公布日期
1935.04.15
申请号
GB19340026683
申请日期
1934.09.17
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
H05B41/10
主分类号
H05B41/10
代理机构
代理人
主权项
地址
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