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发明名称
ATTENDANCE/LEAVING DISPLAY SYSTEM USING TELEPHONE LINE
摘要
申请公布号
JPS643796(A)
申请公布日期
1989.01.09
申请号
JP19870159417
申请日期
1987.06.25
申请人
MATSUSHITA ELECTRIC WORKS LTD
发明人
KAWAMURA TAKEYOSHI;TANAKA TOSHIAKI
分类号
G08B5/00;H04M11/00
主分类号
G08B5/00
代理机构
代理人
主权项
地址
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