Issued Patents All Time
Showing 51–75 of 91 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5442912 | Hydraulic recovery device | Genroku Sugiyama, Masami Ochiai | 1995-08-22 |
| 5433076 | Hydraulic control valve apparatus and hydraulic drive system | Genroku Sugiyama, Yusaku Nozawa, Masami Ochiai | 1995-07-18 |
| 5421155 | Hydraulic drive system for hydraulic working machines | Genroku Sugiyama, Koji Ishikawa, Masami Ochiai | 1995-06-06 |
| 5394697 | Hydraulic drive system | — | 1995-03-07 |
| 5392539 | Hydraulic drive system for construction machine | Genroku Sugiyama, Masami Ochiai | 1995-02-28 |
| 5315826 | Hydraulic drive system and directional control valve | Genroku Sugiyama | 1994-05-31 |
| 5285643 | Hydraulic drive system for civil-engineering and construction machine | Hiroshi Onoue | 1994-02-15 |
| 5267440 | Hydraulic control system for construction machine | Kazunori Nakamura, Yusuke Kajita, Genroku Sugiyama, Hiroshi Onoue, Hideaki Tanaka +3 more | 1993-12-07 |
| 5203678 | Valve apparatus and hydraulic drive system | Genroku Sugiyama, Yusuke Kajita | 1993-04-20 |
| 5186000 | Hydraulic drive system for construction machines | Genroku Sugiyama, Yusuke Kajita | 1993-02-16 |
| 5177964 | Hydraulic drive traveling system | Hideaki Tanaka, Genroku Sugiyama, Hitoshi Kagiwada, Tomohiko Yasuoka, Hiroshi Watanabe +2 more | 1993-01-12 |
| 5168705 | Hydraulic drive system | Hideaki Tanaka, Kazunori Nakamura, Hideshi Koiwai, Yoneaki Takahashi | 1992-12-08 |
| 5161575 | Direction selector valve having load-sensing function | Rindo Morikawa, Kiyoshi Oyama, Yusuke Kajita, Genroku Sugiyama | 1992-11-10 |
| 5155996 | Hydraulic drive system for construction machine | Akira Tatsumi, Masakazu Haga, Eiki Izumi | 1992-10-20 |
| 5152143 | Hydraulic drive system | Yusuke Kajita, Genroku Sugiyama | 1992-10-06 |
| 5152140 | Pressure compensating valve spool positioned by difference in pressure receiving areas for load and inlet pressures | Hideaki Tanaka, Genroku Sugiyama, Yusuke Kajita, Kazunori Nakamura | 1992-10-06 |
| 5150574 | Hydraulic drive system for civil engineering and construction machine | Hideaki Tanaka, Genroku Sugiyama, Yusuke Kajita | 1992-09-29 |
| 5146747 | Valve apparatus and hydraulic circuit system | Genroku Sugiyama | 1992-09-15 |
| 5140815 | Valve apparatus | Genroku Sugiyama, Hideaki Tanaka, Kazumasa Yuasa, Yusaku Nozawa | 1992-08-25 |
| 5134853 | Hydraulic drive system for construction machines | Genroku Sugiyama, Yusuke Kajita | 1992-08-04 |
| 5101629 | Hydraulic circuit system for working machine | Genroku Sugiyama | 1992-04-07 |
| 5085051 | Displacement of variable displacement pump controlled by load sensing device having two settings for low and high speed operation of an actuator | — | 1992-02-04 |
| 5083430 | Hydraulic driving apparatus | Hideaki Tanaka, Genroku Sugiyama, Yusaku Nozawa | 1992-01-28 |
| 5079919 | Hydraulic drive system for crawler mounted vehicle | Kazunori Nakamura | 1992-01-14 |
| 5074194 | Hydraulic driving method of and hydraulic driving apparatus for hydraulic machine | Kuniaki Yoshida, Hideaki Tanaka, Genroku Sugiyama, Masakazu Haga | 1991-12-24 |