Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9970242 | Galling resistant drill pipe tool joint and corresponding drill pipe | Tomoyuki Narikawa, Tatsuo Ono, Koji Sakura, Toshihiko Fukui, Takeshi Kuwano +2 more | 2018-05-15 |
| 8034198 | Austenitic stainless steel tube for boiler with excellent resistance to high temperature steam oxidation | Yusuke Minami, Hitoshi Iijima, Toshihiko Fukui, Tatsuo Ono | 2011-10-11 |