Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8052032 | Composite material and producing method thereof | Seunghwan Park, Kazutaka Okamoto | 2011-11-08 |
| 8006890 | Friction stir processing apparatus with a vibrator | Kazutaka Okamoto, Seung Hwan Park | 2011-08-30 |