Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10823521 | Apparatus and method for designing rifling rate to increase lifespan of gun barrel | Seil An, Yunjung Oh | 2020-11-03 |
| 8635797 | Rifling angle calculating method | Young Hyun Lee, Chang Ki Cho | 2014-01-28 |