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发明名称
Einrichtung zum Senden von elektrischen Schwingungen nach einer bestimmten Richtung.
摘要
申请公布号
AT131790(B)
申请公布日期
1933.02.10
申请号
ATD131790
申请日期
1931.12.10
申请人
RADIO-AUSTRIA A. G.
发明人
分类号
主分类号
代理机构
代理人
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