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发明名称
Vakuumroehre mit Hilfselektrode (Dreielektrodenroehre) zur Erzeugung und Verstaerkung elektrischer Schwingungen
摘要
申请公布号
DE492046(C)
申请公布日期
1930.02.26
申请号
DE1921F050068D
申请日期
1921.08.28
申请人
DR. ERICH F. HUTH G.M.B.H.
发明人
分类号
H01J19/28
主分类号
H01J19/28
代理机构
代理人
主权项
地址
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