Liang personal patent

1, an electronic board teaching device and its operation control method, patent type: invention, patent number: 292 158, 2006- 1 1, ranking: 1.

2. Science and technology project evaluation system, patent type: software, patent number: 044964,2005-11,ranking:1.

3. Teaching electronic board, patent type: utility model, patent number: 693792, April 2005, ranking: 1.

4. Electronic analog pen, patent type: utility model, patent number: 693599, April 2005, ranking: 1.