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发明名称
ATTENDANCE DISPLAY SYSTEM
摘要
申请公布号
JPH04138594(A)
申请公布日期
1992.05.13
申请号
JP19900261249
申请日期
1990.09.29
申请人
TOSHIBA LIGHTING & TECHNOL CORP
发明人
YAMAKI SHIGEO
分类号
G08B5/00
主分类号
G08B5/00
代理机构
代理人
主权项
地址
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