Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9708698 | Wear resistant steel having excellent toughness and weldability | Jong-Kyo Choi, Young Hwan Park, Hong-Ju Lee | 2017-07-18 |
| 9394579 | High-strength steel material having outstanding ultra-low-temperature toughness and a production method therefor | Kyung-Keun Um, Jong-Kyo Choi, Hee-Goon Noh, Hyun-Kwan Cho | 2016-07-19 |