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经营范围
发明名称
EARPHONE
摘要
申请公布号
US3555207(A)
申请公布日期
1971.01.12
申请号
USD3555207
申请日期
1968.06.04
申请人
AKUSTISCHE U. KINO-GERATE GMBH.
发明人
KARL CECH
分类号
H04M1/05;(IPC1-7):H04M1/05;H04M1/15
主分类号
H04M1/05
代理机构
代理人
主权项
地址
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