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经营范围
发明名称
Elektromagnetische Schallvorrichtung
摘要
申请公布号
DE514719(C)
申请公布日期
1930.12.20
申请号
DENDATK091011D
申请日期
申请人
FRAU ELSBETH KUBIERSCHKY
发明人
分类号
H04R13/02
主分类号
H04R13/02
代理机构
代理人
主权项
地址
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