Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7818968 | Hydraulic control device of construction machine | Yoshiyasu Umezu | 2010-10-26 |
| 7634961 | Hydraulic circuit for construction machine | Tomohiko Asakage, Masaaki Tachino, Kazuhiko Fujii | 2009-12-22 |
| 7594395 | Hydraulic control device for working machine | Hidekazu Oka | 2009-09-29 |
| 7594396 | Hydraulic controller for working machine | — | 2009-09-29 |
| 7513109 | Hydraulic controller for working machine | Yoichiro Yamazaki, Koji Yamashita, Hidekazu Oka, Koji Ueda | 2009-04-07 |
| 7284371 | Hydraulic control system for working machine | Yoichiro Yamazaki, Hidekazu Oka | 2007-10-23 |
| 7174711 | Hydraulic control system and construction machine | Takao Nanjo, Naoki Sugano, Etsujiro Imanishi, Hidekazu Oka | 2007-02-13 |
| 7168246 | Hydraulic control device for working machine | Hidekazu Oka | 2007-01-30 |
| 7155909 | Hydraulic controller for working machine | — | 2007-01-02 |
| 7131453 | Hydraulic valve device and method for assembling the same | Hidekazu Oka | 2006-11-07 |
| 6708490 | Hydraulic system for construction machine | Hidekazu Oka | 2004-03-23 |