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经营范围
发明名称
Piezoelektrisches Mikrophon
摘要
申请公布号
DE495350(C)
申请公布日期
1930.04.05
申请号
DE1927T034000D
申请日期
1927.09.18
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
MEISSNER DR. ALEXANDER
分类号
H04R17/02
主分类号
H04R17/02
代理机构
代理人
主权项
地址
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