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经营范围
发明名称
EARPHONE
摘要
申请公布号
CA821114(A)
申请公布日期
1969.08.19
申请号
CAD821114
申请日期
申请人
AKUSTISCHE U. KINO-GERATE GESELLSCHAFT M.B.H.
发明人
KARL CECH
分类号
主分类号
代理机构
代理人
主权项
地址
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