Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10060014 | Bearing steel having improved fatigue durability and method of manufacturing the same | Sung Chul Cha, Si-Yup LEE, Young Sang Ko, Seung Hyun Hong | 2018-08-28 |
| 9957595 | Carburized alloy steel having improved durability and method of manufacturing the same | Sung Chul Cha, Seung Hyun Hong, Si-Yup LEE | 2018-05-01 |