On 25/7/2017,  the National Office of Intellectual Property – Ministry of Science and Technology signed Decision No. 49693/QĐ-SHTT granting the exclusive patent for Utility Solution No. 1546:

1. Invention name: “Sludge dredging equipment using pneumatic sludge suction technology with movable pump assembly and operating procedure for this equipment”;
2. Patent holder: National Research Institute of Mechanical Engineering – Ministry of Industry and Trade.
3. Authors, who are staff of the National Research Institute of Mechanical Engineering: Trần Đức Quảng, Đinh Viết Hải, Nguyễn Văn Bình, Lê Xuân Quý