Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8029069 | Method of manufacturing toothbrush with needle-shaped bristles, and toothbrush manufactured by the same | Young-Jun Kwon, Sung-Hwan Kwon | 2011-10-04 |
| 7938492 | Toothbrush having pressure relief unit and method of producing same | Young-Jun Kwon, Sung-Hwan Kwon | 2011-05-10 |