On 27 February 2014, Professor Dr. Quazi Hamidul Bari of the Department of Civil Engineering, Khulna University of Engineering & Technology (KUET) with his collaborative research group of the Department of Environmental Systems Engineering, Ritsumeikan University (RU), Japan have achieved a patent No. 1005184 for their invention on ‘A simple filter for he removal of arsenic and iron from groundwater’. The members of the research group were Prof. Dr. Jun Nakajima, Dr. Md. Shafiquzzaman and Prof. Dr. Quazi Hamidul Bari. Te patent certificate of invention has issued by the Department of Patents, Designs & Trademarks, Ministry of Industries, Bangladesh.