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| Number | Title | Issue Date |
| 6669485 | Systems, methods and computer program products for collaborative learning A collaborative learning system, method and computer program product permits live, real time interaction between the audience and a presenter in a controlled learning environment. The collaborative learning system, method and computer program product prov... | 12/30/2003 |
| 6397036 | Systems, methods and computer program products for collaborative learning A collaborative learning system, method and computer program product permits live, real time interaction between the audience and a presenter in a controlled learning environment. The collaborative learning system, method and computer program product prov... | 05/28/2002 |
