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经营范围
发明名称
Circuits électriques à lampes thermoïoniques
摘要
申请公布号
FR836252(A)
申请公布日期
1939.01.13
申请号
FRD836252
申请日期
1938.04.06
申请人
A. C. COSSOR LIMITED
发明人
分类号
H03F3/28;H03F3/32;H03F3/52
主分类号
H03F3/28
代理机构
代理人
主权项
地址
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