发明名称 Child's learning calendar
摘要 A child's learning calendar is set forth to enable a child's association of various shapes and recognize same and simultaneously gain understanding of the sequence and passage of days of the week. The calendar includes seven pairs of matched cards associating a day of the week with a predetermined configuration wherein the cards are each formed at respective engaging edges with extended elecrical contacts whereby positioning of the appropriate and predetermined matched pairs of cards within a pair of overlying compartments, the proper positioning of electrodes will complete an electrical circuit to illuminate a light bulb pair to indicate proper matching of the cards.
申请公布号 US4863386(A) 申请公布日期 1989.09.05
申请号 US19880241456 申请日期 1988.09.08
申请人 MAXEY, MARY A. 发明人 MAXEY, MARY A.
分类号 G09B7/00;G09B19/00 主分类号 G09B7/00
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