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发明名称
MINI ELECTRONIC CALCULATOR WITH BLACKBOARD DISPLAY FORMAT
摘要
申请公布号
GB1574251(A)
申请公布日期
1980.09.03
申请号
GB19770000788
申请日期
1977.01.10
申请人
GENIN R
发明人
分类号
G09B7/02;G06F15/02;G09B19/02;(IPC1-7):G09B19/02
主分类号
G09B7/02
代理机构
代理人
主权项
地址
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