Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6779706 | Frame member for friction stir welding | Masakuni Ezumi, Kazusige Fukuyori, Tetsuya Matsunaga | 2004-08-24 |
| 6712007 | Railway car | Takahisa Yamamoto, Sumio Okuno, Toshiaki Makino | 2004-03-30 |