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经营范围
发明名称
SYSTEM FOR REFRESHING MEMORY
摘要
申请公布号
JPS6212993(A)
申请公布日期
1987.01.21
申请号
JP19850150149
申请日期
1985.07.10
申请人
HITACHI LTD
发明人
KISHI MAKOTO;KUMAGAI TAKASHI
分类号
G11C11/401;G11C11/34;G11C11/406;G11C29/00;G11C29/42
主分类号
G11C11/401
代理机构
代理人
主权项
地址
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