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发明名称
MAGNETIC DEVICE FOR SOUND REPRODUCING MEANS
摘要
申请公布号
CA621091(A)
申请公布日期
1961.05.30
申请号
CAD621091
申请日期
申请人
N.V. PHILIPS GLOEILAMPENFABRIEKEN
发明人
JOHANNES W. DE BRUYN
分类号
主分类号
代理机构
代理人
主权项
地址
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