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经营范围
发明名称
Improvements in or relating to indirectly heated electric discharge tubes
摘要
申请公布号
GB715794(A)
申请公布日期
1954.09.22
申请号
GB19520025430
申请日期
1952.10.10
申请人
PHILIPS ELECTRICAL INDUSTRIES LIMITED
发明人
分类号
C10G45/02;H01J1/20
主分类号
C10G45/02
代理机构
代理人
主权项
地址
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