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发明名称
Anordnung zur Beseitigung akustischer Rueckkopplung
摘要
申请公布号
DE628216(C)
申请公布日期
1936.03.30
申请号
DE1934G087588D
申请日期
1934.03.06
申请人
DIPL.-ING. FRIEDRICH GLADENBECK;DIPL.-ING. FRIEDRICH GLADENBECK
发明人
分类号
H04M9/08
主分类号
H04M9/08
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