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发明名称
Improvements in or relating to apparatus for recording sound
摘要
申请公布号
GB606761(A)
申请公布日期
1948.08.19
申请号
GB19460001756
申请日期
1946.01.18
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
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地址
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