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经营范围
发明名称
Elektroakustisches Schwerhörigengerät
摘要
申请公布号
AT184623(B)
申请公布日期
1956.02.10
申请号
ATD184623
申请日期
1954.04.21
申请人
DDR. ERICH SCHUMANN
发明人
DDR. ERICH SCHUMANN
分类号
主分类号
代理机构
代理人
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地址
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