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发明名称
UN MÉTODO Y DISPOSITIVO DE REPRODUCCIoN DE LA VOZ O DE MuSICA POR MEDIO DE ALTOPARLANTES
摘要
申请公布号
ES224481(A1)
申请公布日期
1956.03.16
申请号
ES19810002244
申请日期
1955.10.15
申请人
PHILIPS'GLOEILAMPENFABRIEKEN, N. V.
发明人
分类号
(IPC1-7):H04
主分类号
(IPC1-7):H04
代理机构
代理人
主权项
地址
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