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发明名称
VORRICHTUNG FUER SCHWERHOERIGE ZUR UEBERTRAGUNG DER LAUTE AUS HOERGERAETEN AUF BEIDE OHREN.
摘要
申请公布号
DE1845890(U)
申请公布日期
1962.02.01
申请号
DE196100H8861U
申请日期
1961.08.02
申请人
ALBERT HARDT
发明人
ALBERT HARDT
分类号
主分类号
代理机构
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地址
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