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发明名称
TRANSPARENT CALCULATOR FOR OVERHEAD PROJECTION
摘要
申请公布号
AU6408490(A)
申请公布日期
1991.04.08
申请号
AU19900064084
申请日期
1990.08.17
申请人
WILLIAM T. STOKES
发明人
WILLIAM T. STOKES
分类号
G03B21/132;G06F15/02;G09B5/00;(IPC1-7):G03B21/00
主分类号
G03B21/132
代理机构
代理人
主权项
地址
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