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发明名称
Einrichtung bei Reklamesprechmaschinen, Radioapparaten, Telegraphonen u. dgl. zum Anpreisen von Verkaufsgegenstaenden
摘要
申请公布号
DE524458(C)
申请公布日期
1931.05.09
申请号
DE1928B137683D
申请日期
1928.06.01
申请人
JOHANNES CHRISTIAN BISCHOFF
发明人
分类号
G09F25/00
主分类号
G09F25/00
代理机构
代理人
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