Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10987721 | Method of manufacturing coil spring and coil spring manufacturing apparatus | — | 2021-04-27 |
| 10612210 | Vertically-movable steps for working vehicles | Katsuhiro Tsutsumi | 2020-04-07 |
| 9688204 | Ladder of working vehicle | Katsuhiro Tsutsumi | 2017-06-27 |
| 8770002 | Linear-spring forming apparatus | — | 2014-07-08 |
| 6942350 | Triangular-pyramidal cube-corner retro-reflective sheeting | Ikuo Mimura, Yutaka Hamada | 2005-09-13 |
| 6318866 | Triangular-pyramidal cube-corner retro-reflective sheeting | Ikuo Mimura, Yutaka Hamada | 2001-11-20 |