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经营范围
发明名称
Improvements in or relating to magnetic recording
摘要
申请公布号
GB654563(A)
申请公布日期
1951.06.20
申请号
GB19480030982
申请日期
1948.11.29
申请人
PHILLIP THEOBALD HOBSON
发明人
分类号
G11B5/70
主分类号
G11B5/70
代理机构
代理人
主权项
地址
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