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发明名称
Haut-parleur utilisant des systèmes d'entraînement divers
摘要
申请公布号
FR681340(A)
申请公布日期
1930.05.13
申请号
FRD681340
申请日期
1929.09.05
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
分类号
H04R23/02
主分类号
H04R23/02
代理机构
代理人
主权项
地址
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