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经营范围
发明名称
Schaltung fuer UEbungsmorseschreiber mit Motorantrieb, die wahlweise aus einem Wechselstrom- oder Gleichstromnetz gespeist werden koennen
摘要
申请公布号
DE682595(C)
申请公布日期
1939.10.18
申请号
DE1937H153316D
申请日期
1937.10.20
申请人
DR.-ING. RUDOLF HELL
发明人
HELL DR.-ING. RUDOLF
分类号
G09B19/26;H04L12/10
主分类号
G09B19/26
代理机构
代理人
主权项
地址
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