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发明名称
Dispositif destiné à la reproduction des sons
摘要
申请公布号
FR700069(A)
申请公布日期
1931.02.24
申请号
FRD700069
申请日期
1930.08.04
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
F16F9/44;H03G9/06
主分类号
F16F9/44
代理机构
代理人
主权项
地址
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