发明名称 Self-Correcting Learning Tray With Inserted Cards
摘要 A self-correcting learning tray is described comprising a see-through base and lid. Cards are inserted into the base to underlay the answer cells with the answer possibilities for the activity. There are two shapes of cards. One shape enables the card to also underlay the base as well as the lid. The other shape enables the card to sit under the answer cells of the base with the remainder protruding outside of the coverage area of the tray. Each card is printed with a unique pattern on the reverse side. Each tile has a component of that pattern printed on it. The answer is revealed by turning the tray over and sliding out the card, where the answer printed on the card should match the answer comprised by the tiles in the base of the tray.
申请公布号 US2011189644(A1) 申请公布日期 2011.08.04
申请号 US201113015803 申请日期 2011.01.28
申请人 MILNE DUNCAN;KIRSCHBERG ANNA 发明人 MILNE DUNCAN;KIRSCHBERG ANNA
分类号 G09B3/00 主分类号 G09B3/00
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