Issued Patents All Time
Showing 51–75 of 94 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5934879 | Pump torque control system | Shigetoshi Konno, Toichi Hirata, Shigehiro Yoshinaga, Youichi Kowatari, Kouji Ishikawa | 1999-08-10 |
| 5930996 | Auto-acceleration system for prime mover of hydraulic construction machine and control system for prime mover and hydraulic pump | Kazunori Nakamura, Ei Takahashi, Tsukasa Toyooka, Kouji Ishikawa, Tsuyoshi Nakamura +3 more | 1999-08-03 |
| 5911506 | Control system for prime mover and hydraulic pump of hydraulic construction machine | Kazunori Nakamura, Ei Takahashi, Tsukasa Toyooka, Kouji Ishikawa, Tsuyoshi Nakamura +3 more | 1999-06-15 |
| 5907951 | Hydraulic control system for construction machine | Tsukasa Toyooka, Toichi Hirata, Kouji Ishikawa, Tsuyoshi Nakamura | 1999-06-01 |
| 5890303 | Hydraulic by-pass circuit for a hydraulic shovel | Kouji Ishikawa, Toichi Hirata, Tsukasa Toyooka, Youichi Kowatari | 1999-04-06 |
| 5848531 | Hydraulic drive system for construction machines | Tsuyoshi Nakamura, Toichi Hirata, Tsukasa Toyooka, Youichi Kowatari, Kouji Ishikawa | 1998-12-15 |
| 5829252 | Hydraulic system having tandem hydraulic function | Toichi Hirata, Tsukasa Toyooka | 1998-11-03 |
| 5813311 | Hydraulic control system for hydraulic working machine | Tsukasa Toyooka, Toichi Hirata, Shigehiro Yoshinaga, Kouji Ishikawa, Youichi Kowatari +1 more | 1998-09-29 |
| 5758499 | Hydraulic control system | Toichi Hirata | 1998-06-02 |
| 5673558 | Hydraulic circuit system for hydraulic excavator | Toichi Hirata, Koji Ishikawa, Tsukasa Toyooka, Tsuyoshi Nakamura | 1997-10-07 |
| 5575148 | Hydraulic pump control system | Toichi Hirata, Hiroshi Watanabe, Shigehiro Yoshinaga | 1996-11-19 |
| 5479778 | Hydraulic control system for construction machines | Tsukasa Toyooka, Toichi Hirata, Akira Tatsumi | 1996-01-02 |
| 5471839 | Valve apparatus and hydraulic drive system | Toichi Hirata | 1995-12-05 |
| 5446979 | Hydraulic circuit system for civil engineering and construction machines | Toichi Hirata | 1995-09-05 |
| 5447027 | Hydraulic drive system for hydraulic working machines | Koji Ishikawa, Toichi Hirata | 1995-09-05 |
| 5442912 | Hydraulic recovery device | Toichi Hirata, Masami Ochiai | 1995-08-22 |
| 5433076 | Hydraulic control valve apparatus and hydraulic drive system | Toichi Hirata, Yusaku Nozawa, Masami Ochiai | 1995-07-18 |
| 5421155 | Hydraulic drive system for hydraulic working machines | Toichi Hirata, Koji Ishikawa, Masami Ochiai | 1995-06-06 |
| 5392539 | Hydraulic drive system for construction machine | Toichi Hirata, Masami Ochiai | 1995-02-28 |
| 5315826 | Hydraulic drive system and directional control valve | Toichi Hirata | 1994-05-31 |
| 5267440 | Hydraulic control system for construction machine | Kazunori Nakamura, Yusuke Kajita, Toichi Hirata, Hiroshi Onoue, Hideaki Tanaka +3 more | 1993-12-07 |
| 5203678 | Valve apparatus and hydraulic drive system | Toichi Hirata, Yusuke Kajita | 1993-04-20 |
| 5186000 | Hydraulic drive system for construction machines | Toichi Hirata, Yusuke Kajita | 1993-02-16 |
| 5177964 | Hydraulic drive traveling system | Hideaki Tanaka, Toichi Hirata, Hitoshi Kagiwada, Tomohiko Yasuoka, Hiroshi Watanabe +2 more | 1993-01-12 |
| 5161575 | Direction selector valve having load-sensing function | Rindo Morikawa, Kiyoshi Oyama, Toichi Hirata, Yusuke Kajita | 1992-11-10 |