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经营范围
发明名称
Elektrische Entladungsröhre mit einem Graphitgitter.
摘要
申请公布号
CH274364(A)
申请公布日期
1951.03.31
申请号
CHD274364
申请日期
1949.05.11
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
GLOEILAMPENFABRIEKEN N. V. PHILIPS'
分类号
H01J19/30
主分类号
H01J19/30
代理机构
代理人
主权项
地址
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