Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9567241 | Continuous circulation sand filter and continuous circulation sand filtering method | You-Mee Na, Ho-Chan Jung, Ha Na Yu | 2017-02-14 |
| 8642002 | Hydrogen gas production system utilizing silicon wastewater and method for production of hydrogen energy using the same | Chae-Seok CHOI, Ji-Hyeon HWANG | 2014-02-04 |
| 8506807 | Spiral wound type filter cartridge | Sun-Yong Lee, Doo Won HAN, Hyoung Jun Ahn, Eu Jean MOON, Suk Young Lee | 2013-08-13 |
| 7766173 | Polyamide reverse osmosis composite membrane and preparation method thereof | Moo-Kyung Moon, Je-Kang Yoo, Sun-Yong Lee, Hyoung Jun Ahn, Doo Won HAN | 2010-08-03 |
| 7598296 | Preparation method of polyamide thin film composite reverse osmosis membrane and polyamide thin film composite reverse osmosis membrane prepared therefrom | Je-Kang Yoo, Sun-Yong Lee | 2009-10-06 |