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发明名称
Durch Muenzeinwurf ausloesbare Vorrichtung fuer Sprechmaschinen mit elektrischem Antrieb
摘要
申请公布号
DE584812(C)
申请公布日期
1933.09.25
申请号
DE1931A064406D
申请日期
1931.12.13
申请人
CHARLES AHRENS
发明人
分类号
G07F17/30
主分类号
G07F17/30
代理机构
代理人
主权项
地址
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