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发明名称
Radiotelegraphische bzw. telegraphische Einrichtung, bei welcher die einzelnen Zeichen aus Gruppen von zwei oder mehr Frequenzen gebildet werden
摘要
申请公布号
DE566790(C)
申请公布日期
1932.12.22
申请号
DE1929S089309D
申请日期
1929.01.11
申请人
S. A. BREVETTI ITALIANI ESTERI S. A. B. I. E.
发明人
分类号
H04L27/26
主分类号
H04L27/26
代理机构
代理人
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地址
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