G09B 1/14

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
9852654 Learning aidSep 30, 13Dec 26, 17Exton, John
5423682 Numbering system teaching aidJan 24, 94Jun 13, 95Not available
5362061 Game board apparatusDec 15, 93Nov 08, 94Not available
4741701 Apparatus for providing visual feedback concerning behaviorMar 17, 87May 03, 88Not available
4682955 Educational toyOct 28, 85Jul 28, 87Not available
4384855 Educational task recorder for childrenDec 31, 81May 24, 83Not available
4377286 Multicolored globe adapted to make combinations between colors on multitudinous directionsOct 26, 81Mar 22, 83Not available
4377384 Three-dimensional teaching deviceMay 26, 81Mar 22, 83Not available
4344759 Method and apparatus for inducing psychological responsesOct 14, 80Aug 17, 82Not available