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发明名称
Procédé de fabrication de cathodes à chauffage indirect
摘要
申请公布号
FR886755(A)
申请公布日期
1943.10.25
申请号
FRD886755
申请日期
1942.10.13
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
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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