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经营范围
发明名称
Magnetic data storage device utilizing discs with predetermined frequency zones
摘要
申请公布号
US3187316(A)
申请公布日期
1965.06.01
申请号
US19610128190
申请日期
1961.07.31
申请人
EX-CELL-O CORPORATION
发明人
JOHNSON FORREST A.;MILLER HERBERT E.
分类号
G11B5/012;G11B5/60
主分类号
G11B5/012
代理机构
代理人
主权项
地址
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