发明名称 Answer sheet adapted for computer scoring
摘要 An answer sheet adapted for computer scoring has a first mark enclosing a space, printed on the sheet, and a second mark enclosing a space, printed on the sheet, wherein the second mark is encompassed by the first mark.
申请公布号 US2006073465(A1) 申请公布日期 2006.04.06
申请号 US20040936671 申请日期 2004.09.09
申请人 KUBO HIDEYUKI 发明人 KUBO HIDEYUKI
分类号 G09B3/00 主分类号 G09B3/00
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