National patent authorized by Li Hao.

1, additional bending normal stress measuring bridge in bending-torsion combined test device, authorized date: 20 1 1.3, the first inventor.

2. Bending-torsion combined test device and its application in internal force element measurement, authorized in June 2009, the first inventor.

3. Rear axle noise quality test bench, authorized date: June 2009, second inventor: 1, dynamic stress experimental device with adjustable static load position, authorized date: 2007. 1 1, first inventor.

2. Dynamic stress experimental device, 2007. 1 1 authorized, the first inventor.

3. On-line detection system for noise quality of rear axle, authorized by10 in 2007, the first inventor.