Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7601432 | Friction stir welding method and group of shape members for friction stir welding | Masakuni Ezumi, Tetsuya Matsunaga | 2009-10-13 |
| 7121450 | Friction stir welding method and group of shape members for friction stir welding | Masakuni Ezumi, Tetsuya Matsunaga | 2006-10-17 |
| 6651567 | Railway car | Michifumi Takeichi, Kazuhiro Makino, Kentaro Masai, Daisuke Muto | 2003-11-25 |