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发明名称
LAUTSTAERKE- UND TONREGELUNG FUER RADIOAPPARATE.
摘要
申请公布号
DE1601216(U)
申请公布日期
1950.02.09
申请号
DE194900D9879U
申请日期
1949.01.10
申请人
WILHELM KOEPPEN
发明人
WILHELM KOEPPEN
分类号
主分类号
代理机构
代理人
主权项
地址
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