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经营范围
发明名称
Microphone arrangement
摘要
申请公布号
US2197691(A)
申请公布日期
1940.04.16
申请号
US19380188249
申请日期
1938.02.02
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M. B. H.
发明人
GERLACH ERWIN
分类号
H04M1/15;H04R1/06
主分类号
H04M1/15
代理机构
代理人
主权项
地址
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