Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8414194 | Cylindrical roller bearing | — | 2013-04-09 |
| 8227950 | Rolling bearing, spindle support structure of main motor for railway vehicle, and bearing structure | Katsunori Sone, Tsukasa Yamakawa, Naoaki Tsuji | 2012-07-24 |
| 8044544 | Rolling bearing, spindle support structure of main motor for railway vehicle, and bearing structure | Katsunori Sone, Tsukasa Yamakawa, Naoaki Tsuji | 2011-10-25 |
| 7503697 | Rolling bearing assembly having an improved resistance to electric corrosion | Naoaki Tsuji | 2009-03-17 |
| 7097362 | Electrocorrosion preventive rolling bearing | Kosuke Inukai, Yukihiro Kataoka, Kiyoshi Sato | 2006-08-29 |
| 4856916 | Conducting rolling bearing | Koji Kametaka, Yukihisa Tsumori | 1989-08-15 |