Issued Patents 2022
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11442380 | Controlling toner refill by using toner refill cartridge | Jea Hong Park | 2022-09-13 |
| 11249417 | Toner refill control using reusable refill apparatus | Sun-kye Hwang | 2022-02-15 |