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发明名称
Perfectionnements aux cathodes destinées à la production d'un faisceau électronique
摘要
申请公布号
FR903976(A)
申请公布日期
1945.10.23
申请号
FRD903976
申请日期
1944.05.05
申请人
FIDES GESELLSCHAFT FU:R DIE VERWALTUNG UND VERWERTUNG VON GEWERBLICHEN SCHUTZRECHTENMIT BESCHRANKTER HAFTUNG
发明人
分类号
H01J1/28;H01J3/02
主分类号
H01J1/28
代理机构
代理人
主权项
地址
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