G09B 1/10

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
9881509 Educational toy simulatorJul 29, 16Jan 30, 18Not available
6162059 Problem solving skills development system using tactile recognitionMar 16, 99Dec 19, 00Not available
5865627 Education system kitFeb 12, 97Feb 02, 99Not available
5176521 Educational apparatus with interchangeable task assigning templateDec 20, 91Jan 05, 93Not available
5174757 Interactive sculptural compositionOct 31, 90Dec 29, 92Delaware Art Museum
5114349 Element for a didactic play, and a set formed by such elementsNov 09, 90May 19, 92Not available
4979749 Multi-use number boardOct 10, 89Dec 25, 90Not available
4884973 Mathematic teaching aidJan 18, 89Dec 05, 89Not available
4846687 Sign language blocksOct 11, 88Jul 11, 89Not available
4526550 Combination system and question and answer matching gameJan 13, 84Jul 02, 85Not available
4437838 Apparatus for preparing examinationsApr 26, 82Mar 20, 84TTK Communication Products
4424039 Mathematics teaching deviceSep 29, 82Jan 03, 84Not available
4197661 Educational toysFeb 25, 77Apr 15, 80B & H Commercial Inventors & Designers Limited, COOK, PETER HENRY,
4186497 Assembly for facilitating teaching readingFeb 13, 78Feb 05, 80Not available