Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11204568 | Plunger locking structure in syringe type toner refill cartridge | Woongyong Choi | 2021-12-21 |
| D907698 | Development cartridge for a printer | Ji-Won Moon, Seung-gweon Lee, Woong-Yong Choi, Yong-Kwan Cho, Yongil Moon +5 more | 2021-01-12 |