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经营范围
发明名称
Durch Schwingungsmittel gesteuerter Apparat zur Weitergabe und Wiederherstellung telegraphischer Zeichen in Geh-Steh-Telegraphenanlagen
摘要
申请公布号
DE569695(C)
申请公布日期
1933.02.15
申请号
DE1929I036904D
申请日期
1929.01.31
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
分类号
H04L25/20
主分类号
H04L25/20
代理机构
代理人
主权项
地址
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