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经营范围
发明名称
Arrangement for sound recording and reproduction from a magnetizable disk
摘要
申请公布号
US2810581(A)
申请公布日期
1957.10.22
申请号
US19550504331
申请日期
1955.04.27
申请人
SVENSKA AKTIEBOLAGET GASACCUMULATOR
发明人
BERGNE ARNE
分类号
G11B5/012
主分类号
G11B5/012
代理机构
代理人
主权项
地址
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