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发明名称
Procédé et dispositif permettant de moduler la fréquence d'oscillations électriques
摘要
申请公布号
FR685401(A)
申请公布日期
1930.07.10
申请号
FRD685401
申请日期
1929.11.22
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
H03C5/04
主分类号
H03C5/04
代理机构
代理人
主权项
地址
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