Profile    Main Product    Research    from CEO   

Our Research and development team consists of ten scientists who hold master or doctoral degrees in the relevant areas. Dr. Khak Su Tyan, the famous Russian scientist in the area of hydraulic measurement, has been leading the team since 1994. Under his leadership, we have acquired 35 patents for our products in USA, Japan, Germany, Russia, and Korea.




Dr. Khak Su Tyan, Head of Research and Development Institute of Chang Min Tech Co., Ltd.


1967-1987 : Research Director & Vice President of Science Div., Soviet Union Water Management and Irrigation Facility Automation in the Scientific Research Institute.

1987-1991 : Vice President of Science Div. in the Russia National Hydrologic & Scientific Research Institute

1994-         : Head of the Research and Development Institute of Chang Min Tech. Co., Ltd. for New Technology Development

Publication of Scientific Essay : 50 papers (USSR, Russia)

Number of Invention : 36 cases (USSR, Russia)





Acquisition of Patent : 35 cases since the year 1994
   (USA, Japan, Germany, Russia, Canada and Korea)

No SUBJECT COUNTRY PATENT NO. (DATE OF PAT) 1 Ultrasonic Flow Measuring Method and Apparatus USA 5,531,124. (Jul.02,1996) JAPAN 2676321 (Jul.25,1997) GERMANY 4430223 (May.25,2000) KOREA 110625 (Jan.13,1997) 2 Local River Flow Velocity Measuring Method and Apparatus USA 5.515.721 (May.14,1996) JAPAN 2863748 (Dec.11,1998) GERMANY 44 30 230 (Jun.29,2000) KOREA 101897 (Jul.10,1996) 3 Measuring Method of a Wide Range Level and an Apparatus USA 5.842.374 (Dec.01,1998) JAPAN 2756647 (Mar.13,1998) GERMANY 19511234 (Nov.09,1997) CANADA 2,145,815 (Feb.06,2001) KOREA 150714 (Jun.16,1998) 4 Level Measurement Method Using Measurements of Water Column Pressure USA 5.791.187 (Aug.11,1998) JAPAN 2855423 (Nov.27,1998) RUSSIA 2124702 (Jan.10,1999) GERMANY 19620656 (Mar.02,2000) CANADA 2,171,801 (Jan.25,2000) KOREA 185260 (Dec.23,1998) 5 Apparatus for Measuring the Flow Quantity of Rivers and Method USA 5.734.111 (Mar.31,1998) JAPAN 2955920 (Jul.23,1999) KOREA 169090 (Oct.08,1998) 6 Open Channel Multichannel Ultrasonic Flowrate Measurement Apparatus and Method USA 5.780.747 (Jul.14,1998) JAPAN 2873443 (Jan.14,1999) KOREA 169091 (Oct.08,1998) RUSSIA 2139502 (Jun.23,1999) 7 Ultrasonic Multi-channel Flow Rate Measuring Apparatus USA 6,089,104 (Jul.18,2000) JAPAN 2935833 (Jun.04,1999) KOREA 170815 (Oct.16,1998) RUSSIA 2138782 (Sep.27,1999) 8 Method of Measuring a River Horizontal Average Flow Velocity USA 5,952,583 (Sep.14,1999) KOREA 0293842 (Apr.09,2001) 9 Ultrasonic Flow Velocity Measuring Method KOREA 0298474 (May.31,2001) 10 Ultrasonic flow Velocity Measuring Apparatus USA 6.012.338 (Jan.11,2000) KOREA 0276462 (Sep.29,2000) 11 Open Channel Vertical Average Flow Velocity Measuring Apparatus KOREA 0266910 (Jun.28,2000)