David's personal patent

1. Electric blackboard brush ZL9923 1072.5

2. Horizontal Young's Modulus Instrument ZL2007 1004844.6

3. Commendation/reward for the teaching of "Compound Pendulum Experimental Instrument":

1. Excellent teachers in Nanchong, Nanchong Education Commission, September 2004.

2. The teaching case of low-voltage electrical appliance-contactor won the third prize of China Excellent Vocational Education Paper (No.:980004).

3. "Six Taboos in Physics Demonstration Experiment" won the National Excellent Vocational Education Article Excellence Award (No.14U045).