| 2014 | 10.31 | Cyclone dust collector bag filter |
| 09.04 | Activated carbon recycling and dioxin reducing facilities | |
| 2013 | 11.05 | Waste gas sludge dryer |
| 2012 | 01.05 | Heat pump system using air heat and solar heat |
| 2011 | 02.17 | Cooling and heating systems using hydrothermal sources |
| 2010 | 04.12 | Method of producing a molybdenum alloy |
| 2007 | 10.08 | Method of manufacturing an iron powder |
| 2003 | 02.13 | Apparatus for removing residual chlorine oxide |
| 2001 | 05.21 | Apparatus for producing a high-functional iron oxide |
