Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5857330 | Travelling control circuit for a hydraulically driven type of travelling apparatus | Naoki Ishizaki | 1999-01-12 |
| 5832808 | Directional control valve unit | Naoki Ishizaki | 1998-11-10 |
| 5794510 | Pressurized fluid feed system | Yoichi Netsu, Mitsumasa Akashi | 1998-08-18 |
| 5730182 | Pressure compensation valve | Naoki Ishizaki | 1998-03-24 |
| 5701796 | Hydraulic apparatus for traveling | Mitsumasa Akashi | 1997-12-30 |
| 5234028 | Variable pressure control valve | Sadao Nunotani, Naoki Ishizaki | 1993-08-10 |
| 5163477 | Electrohydraulic proportional control valve | Sadao Nunotani, Naoki Ishizaki | 1992-11-17 |
| 5136930 | Apparatus for supplying pressure oil to hydraulic cylinders employed in working machines | Tadao Karakama, Hiroshi Endo, Sadao Nunotani, Naoki Ishizaki | 1992-08-11 |
| 5076144 | Poppet valve device | Tadao Karakama, Sadao Nunotani, Naoki Ishizaki | 1991-12-31 |
| 4984603 | Flow control valve assembly | Tadao Karakama, Naoki Ishizaki, Sadao Nunotani | 1991-01-15 |