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经营范围
发明名称
Mikrophon für Mikrotelephone.
摘要
申请公布号
AT125607(B)
申请公布日期
1931.11.25
申请号
ATD125607
申请日期
1930.09.22
申请人
VEREINIGTE TELEPHON- UND TELEGRAPHENFABRIKS-AKTIEN-GESELLSCHAFT CZEIJA, NISSL & CO.
发明人
分类号
主分类号
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