| Patents for G09B 7 - Electrically-operated teaching apparatus or devices working with questions and answers (7,087) |
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| 04/02/1991 | US5004966 Computer activated reward dispensing machine |
| 03/27/1991 | CN2074037U Interesting teaching device for children |
| 03/27/1991 | CN1050278A Sound production device for questions of calculation with an obacus |
| 03/26/1991 | US5002491 Electronic classroom system enabling interactive self-paced learning |
| 03/06/1991 | CN2072708U Electron brain intelligence initiating unit |
| 02/07/1991 | WO1991001540A1 Computer game teaching method and system |
| 02/06/1991 | EP0411522A2 Educational or amusement device |
| 02/05/1991 | US4990093 Teaching and amusement apparatus |
| 02/05/1991 | CA2022641A1 Educational or amusement device |
| 01/16/1991 | CN2069589U Multifunctional intelligence teaching aid for children |
| 01/15/1991 | US4985697 Electronic book educational publishing method using buried reference materials and alternate learning levels |
| 01/02/1991 | EP0404904A1 Expert data collection, analysis, and response system and method |
| 12/18/1990 | US4978305 Free response test grading method |
| 12/12/1990 | CN2067436U Intelligence learning microcomputer for children |
| 11/28/1990 | EP0399897A1 System for individual participation in a television broadcast |
| 11/28/1990 | EP0399667A2 Electronic classroom system enabling self-paced learning |
| 11/15/1990 | CA2012609A1 Test scoring machine |
| 11/13/1990 | US4970659 Learning aid or game having miniature electronic speech synthesis chip |
| 11/07/1990 | CN2065345U Intelligent preschool education apparatus |
| 11/06/1990 | US4969194 Apparatus for drilling pronunciation |
| 11/06/1990 | US4968255 Electronic instructional apparatus |
| 10/30/1990 | US4967354 Method of preparing customized written examinations |
| 10/04/1990 | WO1990011587A1 Compiling system and method of producing individually customized recording media |
| 09/19/1990 | EP0388093A2 Interactive facsimile system and method of information retrieval |
| 09/05/1990 | CN2061719U Multi-purpose checker with isterest music |
| 08/24/1990 | WO1990010283A1 Sparking stylus for acoustic digitizer |
| 08/24/1990 | CA2047238A1 Sparking stylus for acoustic digitizer |
| 08/22/1990 | CN2060925U Answer-choosing machines for teaching |
| 08/14/1990 | US4948126 Event adjudicator and interface |
| 08/09/1990 | WO1990009020A1 Interactive language learning system |
| 08/07/1990 | US4946391 Electronic arithmetic learning aid with synthetic speech |
| 07/25/1990 | CN2059753U Game device for arithmetic checking |
| 07/17/1990 | CA1271847A1 Computer-based education system |
| 07/10/1990 | US4941040 Cable television system selectively distributing pre-recorded video and audio messages |
| 06/20/1990 | CN2058515U Studying device for children |
| 05/31/1990 | WO1990005970A1 Expert data collection, analysis, and response system and method |
| 05/22/1990 | CA1269441A1 Viewer interactive television system |
| 05/17/1990 | WO1990005350A1 Interactive audiovisual control mechanism |
| 05/15/1990 | US4926255 System for evaluation of response to broadcast transmissions |
| 05/09/1990 | CN1007939B Instant feedback device for the examinating result of the multiple-choice questions |
| 05/02/1990 | EP0366449A2 Address table editing system |
| 05/01/1990 | US4921427 Educational device |
| 04/25/1990 | EP0364884A2 Detection system for optical touch panel |
| 04/17/1990 | US4918516 Closed circuit television system having seamless interactive television programming and expandable user participation |
| 04/11/1990 | CN2055968U Mathematics electrical audio-visual board for children |
| 03/28/1990 | CN2055278U Electronic learning device for children |
| 03/28/1990 | CN2055277U 卡片学习机 Card learning machine |
| 03/27/1990 | US4912671 Electronic dictionary |
| 02/28/1990 | EP0355087A1 Teaching and amusement apparatus |
| 02/21/1990 | CN2053357U Multipurpose studying computer for children |
| 01/23/1990 | US4895518 Computerized diagnostic reasoning evaluation system |
| 01/09/1990 | US4893333 Interactive facsimile system and method of information retrieval |
| 01/02/1990 | US4891474 Sparking stylus for acoustic digitizer |
| 11/22/1989 | CN2048221U Mathematics intelligent toy for infant |
| 11/15/1989 | CN2047819U Children's micro-computer |
| 10/31/1989 | US4877408 Competitive computer educational game |
| 10/31/1989 | US4877404 Graphical interactive software system |
| 10/24/1989 | US4876592 System for merchandising and the evaluation of responses to broadcast transmissions |
| 10/03/1989 | US4872122 Interactive statistical system and method for predicting expert decisions |
| 09/19/1989 | US4868374 Self-contained detector device for checking information recorded on a carrier |
| 09/12/1989 | CA1259413A1 Autonomous detecting device to check informations recorded on a medium |
| 09/06/1989 | CN2044088U Machine used for children learning |
| 09/05/1989 | US4863386 Child's learning calendar |
| 09/05/1989 | US4863384 Personalized feedback system utilizing pre-recorded media and method of making same |
| 08/08/1989 | US4854879 Self-teaching book for children with an electronic device |
| 07/26/1989 | CN2041840U Multifunction electronic intelligence device for children |
| 07/11/1989 | US4847784 A computer |
| 07/11/1989 | US4847700 Interactive television system for providing full motion synched compatible audio/visual displays from transmitted television signals |
| 07/11/1989 | US4847699 Method for providing an interactive full motion synched compatible audio/visual television display |
| 07/11/1989 | US4847698 Interactive television system for providing full motion synched compatible audio/visual displays |
| 07/11/1989 | EP0231199A4 Event adjudication and interface. |
| 06/21/1989 | EP0320749A2 Portable medical history-taking device |
| 05/16/1989 | US4830618 Electronic spelling machine |
| 05/10/1989 | CN2037490U Electronic intelligence toy |
| 05/03/1989 | EP0314572A2 Closed circuit television system having seamless interactive television programming and expandable user participation |
| 05/03/1989 | EP0313976A2 Electronic educational video system apparatus |
| 04/12/1989 | EP0310766A1 Electronic instructional apparatus |
| 04/11/1989 | US4820167 Electronic school teaching system |
| 03/14/1989 | US4812126 Education or learning aid method |
| 03/14/1989 | US4812125 Interactive teaching apparatus |
| 03/08/1989 | CN2033928U Electronic knowlege answering instrument for children |
| 03/08/1989 | CN2033927U Paper tape type proofreading apparatus used for mathematics keys |
| 03/07/1989 | US4811273 Language learning apparatus |
| 03/01/1989 | CN1031438A Real-time feedback and processing system of education informations |
| 02/14/1989 | US4805134 Electronic system for accessing graphical and textual information |
| 02/14/1989 | US4804328 Interactive audio-visual teaching method and device |
| 02/08/1989 | CN2032349U Electronic learning device for children |
| 01/31/1989 | US4802092 Electric probe used to activate correct and incorrect response areas in an instructional apparatus |
| 01/18/1989 | EP0299831A1 Method for providing an interactive full motion synched compatible audio/visual television display |
| 01/18/1989 | EP0299830A1 Interactive television system for providing full motion synched compatible audio/visual displays from transmitted television signals |
| 01/18/1989 | EP0299829A2 Interactive television system for providing full motion synched compatible audio/visual displays |
| 01/04/1989 | CN2030352U Multifunctional sticks for childrem studying |
| 01/03/1989 | US4796223 Micro-computer control for a video machine |
| 12/27/1988 | US4793813 Computer-based education system |
| 12/15/1988 | WO1988009985A1 Electronic book educational publishing method using buried reference materials and alternate learning levels |
| 11/22/1988 | US4786255 Group education system |
| 11/17/1988 | WO1988009096A1 Remote teaching system |
| 11/15/1988 | US4785472 Remote teaching system |
| 11/01/1988 | US4781099 Musical quiz apparatus |
| 09/27/1988 | US4773860 Multiple aptitude testing device with data terminal input |