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经营范围
发明名称
ELECTRIC DISCHARGE TUBE
摘要
申请公布号
CA631340(A)
申请公布日期
1961.11.21
申请号
CAD631340
申请日期
申请人
N.V. PHILIPS GLOEILAMPENFABRIEKEN
发明人
EDWARD F. DE HAAN
分类号
主分类号
代理机构
代理人
主权项
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