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发明名称
Vorrichtung zur Schallwiedergabe.
摘要
申请公布号
AT122399(B)
申请公布日期
1931.04.25
申请号
ATD122399
申请日期
1929.12.05
申请人
JACOBUS CORNELIS DOUW;JOHAN WILHELM VLIELANDER HEIN;CHRISTIAAN HENRI HENNY;MAX ADOLF HENNY
发明人
JACOBUS CORNELIS DOUW;JOHAN WILHELM VLIELANDER HEIN;CHRISTIAAN HENRI HENNY;MAX ADOLF HENNY
分类号
主分类号
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