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发明名称
Audífono auxiliar.
摘要
申请公布号
ES2035(Y)
申请公布日期
1934.03.01
申请号
ES19350000020U
申请日期
1933.10.10
申请人
HERZ, ERNESTO;JUNK, GERHARD
发明人
分类号
主分类号
代理机构
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