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发明名称
Verfahren zur selbsttaetigen Erweiterung des Lautstaerkenumfanges bei der Wiedergabe von Lichttonaufzeichnungen
摘要
申请公布号
DE579784(C)
申请公布日期
1933.06.30
申请号
DED579784D
申请日期
1930.12.05
申请人
DR. HEINRICH KOENEMANN
发明人
分类号
H03G3/00;H03G3/20;H04B1/62;H04S3/00
主分类号
H03G3/00
代理机构
代理人
主权项
地址
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