发明名称 Toy building blocks for teaching braille
摘要 Toy blocks and sets of toy blocks containing Braille characters for teaching young, sight-impaired children. A typical wooden block is cubical, comprising a pair of opposite, spaced apart display sides having recessed surfaces. One recessed surface contains a raised Braille character, and the opposite side displays the corresponding alphabetic or numerical character or characters. The recessed sides have borders comprising a bottom tactile-sensing portion that includes a plurality of raised nubs adapted to be touched for orienting the characters properly. Smaller Braille characters are preferably disposed beneath each alphabetic character.
申请公布号 US5275567(A) 申请公布日期 1994.01.04
申请号 US19930026838 申请日期 1993.03.05
申请人 WHITFIELD, RUDY V. 发明人 WHITFIELD, RUDY V.
分类号 G09B21/00;(IPC1-7):G09B21/00 主分类号 G09B21/00
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