Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9956673 | Tightening tool | Tetsuya Yokoyama, Yasuhiro Yamamoto, Tomohiro Ogata | 2018-05-01 |
| 8485049 | Torque tool device | Tetsuya Yokoyama, Sinji Murayama, Yasuhiro Yamamoto | 2013-07-16 |