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经营范围
发明名称
Improvements in or relating to sound radiating systems
摘要
申请公布号
GB492098(A)
申请公布日期
1938.09.12
申请号
GB19370007063
申请日期
1937.03.10
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
分类号
H04R1/40
主分类号
H04R1/40
代理机构
代理人
主权项
地址
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