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发明名称
Mikrofon
摘要
申请公布号
DE1915994(A1)
申请公布日期
1970.10.01
申请号
DE19691915994
申请日期
1969.03.28
申请人
LICENTIA PATENT-VERWALTUNGS-GMBH
发明人
MATTFELD,JOHANN
分类号
H04R23/00
主分类号
H04R23/00
代理机构
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