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发明名称
Perfectionnements aux membranes de haut-parleurs de grande puissance
摘要
申请公布号
FR875255(A)
申请公布日期
1942.09.14
申请号
FRD875255
申请日期
1941.08.19
申请人
TELEFUNKEN GESELLSCHAFT FU:R DRAHTLOSE TELEGRAPHIE M. B. H.
发明人
分类号
H04R7/14
主分类号
H04R7/14
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代理人
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