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经营范围
发明名称
DISPLAY BOARD
摘要
申请公布号
GB2041613(B)
申请公布日期
1983.04.13
申请号
GB19800000330
申请日期
1980.01.04
申请人
WALDEKRANTZ B
发明人
分类号
G09B29/00;G09F7/10;(IPC1-7):G09F7/10;G09F7/04
主分类号
G09B29/00
代理机构
代理人
主权项
地址
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