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经营范围
发明名称
Elektronenroehre
摘要
申请公布号
DE500727(C)
申请公布日期
1930.06.26
申请号
DE1925L064438D
申请日期
1925.11.05
申请人
DR. SIEGMUND LOEWE
发明人
分类号
H01J19/78;H03F3/02;H03F3/189
主分类号
H01J19/78
代理机构
代理人
主权项
地址
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