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经营范围
发明名称
Elektromagnetische Schalldose.
摘要
申请公布号
CH271418(A)
申请公布日期
1950.10.31
申请号
CHD271418
申请日期
1949.04.20
申请人
KNECHT,EMIL
发明人
KNECHT,EMIL
分类号
H04R11/08
主分类号
H04R11/08
代理机构
代理人
主权项
地址
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