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发明名称
Mit einer oder mehreren Verstaerkerroehren zusammengebautes Mikrofon
摘要
申请公布号
DE730243(C)
申请公布日期
1943.01.08
申请号
DE1939T052990D
申请日期
1939.10.29
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
GERLACH ERWIN
分类号
H04R1/04
主分类号
H04R1/04
代理机构
代理人
主权项
地址
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