Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8904902 | Unique motor type motor driven column apparatus | Donghan Lee, Sungjong Hong, Sangchul KU | 2014-12-09 |
| 8376402 | Lower type motor driven column apparatus | Seounghoon Lee, Donghan Lee, Sungjong Hong, Sangchul KU, Munchun Park | 2013-02-19 |