Patent Picture Patent No. Patent Name Patent Type Available Date --- Expired Date Verified ZL 2013 2 0246199.7 Automatic Height Adjust ( Automatic Levelling ) Road Curb Machine UTILITY_MODEL 2013-12-25 ~ ZL 2013 2 0246197.8 Traction Road Curb Machine UTILITY_MODEL 2013-10-16 ~ Research & Development There is/are 5 - 10 People R&D Engineer(s) in the company.