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经营范围
发明名称
MEMORY AID
摘要
申请公布号
GB8902639(D0)
申请公布日期
1989.03.30
申请号
GB19890002639
申请日期
1989.02.07
申请人
BURKILL, VANCE
发明人
分类号
G09B1/28;G09C1/04
主分类号
G09B1/28
代理机构
代理人
主权项
地址
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