Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8342056 | Telescopic shaft and vehicle steering apparatus | Ryoichi Tokioka, Mitsuharu Ozaki, Hiroaki Sougumo | 2013-01-01 |
| 7174825 | Hydraulic power steering apparatus | Akihiko Shiina, Yasuhiro Kamatani, Toshiaki Oya, Ryouichi Tokioka, Kazuhiro Watanabe +5 more | 2007-02-13 |