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经营范围
发明名称
FILE PROTECTING DEVICE
摘要
申请公布号
JPS576473(A)
申请公布日期
1982.01.13
申请号
JP19810053052
申请日期
1981.04.10
申请人
IBM
发明人
HERUFURIIDO OTSUTOO RINKUREIBU
分类号
G11B23/28;G11B23/04
主分类号
G11B23/28
代理机构
代理人
主权项
地址
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