Issued Patents 2022
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11492775 | Manhole cover and manhole management system using the same | Won-San Na | 2022-11-08 |
| 11446494 | Skin care device and control method therefor | Jong Min Lee, Jun Ho Park, Won-San Na | 2022-09-20 |
| 11322300 | Method for manufacturing a core for a current transformer | Won-San Na, Young Joon Kim, Jae Jun Ko, Su-Hyeoung Tak | 2022-05-03 |