Issued Patents All Time
Showing 26–50 of 91 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D437602 | Hydraulic excavator | Kazuhiko Hiraoka, Shingo Hirose, Kazuhiko Nishiyama, Akitaka Takeuchi, Yoshiki Yoshida +5 more | 2001-02-13 |
| 6161586 | Tournament oil path constituting apparatus | Genroku Sugiyama, Tsukasa Toyooka, Norio Onuma, Ikuo Inagaki, Masao Kashiwagi | 2000-12-19 |
| 6101456 | Output correcting method in control system, control system, and hydraulic pump control system | Youichi Kowatari, Hidefumi Takegahara, Tsukasa Toyooka, Kouji Ishikawa, Genroku Sugiyama +1 more | 2000-08-08 |
| 6020651 | Engine control system for construction machine | Kazunori Nakamura, Ei Takahashi | 2000-02-01 |
| 5960378 | Excavation area setting system for area limiting excavation control in construction machines | Hiroshi Watanabe, Masakazu Haga, Kazuo Fujishima | 1999-09-28 |
| 5940997 | Hydraulic circuit system for hydraulic working machine | Tsukasa Toyooka, Genroku Sugiyama, Kazunori Nakamura, Kouji Ishikawa, Tsuyoshi Nakamura | 1999-08-24 |
| 5934879 | Pump torque control system | Shigetoshi Konno, Genroku Sugiyama, 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, Genroku Sugiyama, Kouji Ishikawa, Tsuyoshi Nakamura | 1999-06-01 |
| 5890303 | Hydraulic by-pass circuit for a hydraulic shovel | Kouji Ishikawa, Genroku Sugiyama, Tsukasa Toyooka, Youichi Kowatari | 1999-04-06 |
| 5848531 | Hydraulic drive system for construction machines | Tsuyoshi Nakamura, Genroku Sugiyama, Tsukasa Toyooka, Youichi Kowatari, Kouji Ishikawa | 1998-12-15 |
| 5835874 | Region limiting excavation control system for construction machine | Eiji Yamagata, Hiroshi Watanabe, Masakazu Haga, Kazuo Fujishima, Hiroyuki Adachi | 1998-11-10 |
| 5829252 | Hydraulic system having tandem hydraulic function | Genroku Sugiyama, Tsukasa Toyooka | 1998-11-03 |
| 5813311 | Hydraulic control system for hydraulic working machine | Tsukasa Toyooka, Genroku Sugiyama, Shigehiro Yoshinaga, Kouji Ishikawa, Youichi Kowatari +1 more | 1998-09-29 |
| 5758499 | Hydraulic control system | Genroku Sugiyama | 1998-06-02 |
| 5701691 | Region limiting excavation control system for construction machine | Hiroshi Watanabe, Masakazu Haga, Eiji Yamagata, Kazuo Fujishima, Hiroyuki Adachi | 1997-12-30 |
| 5673558 | Hydraulic circuit system for hydraulic excavator | Genroku Sugiyama, Koji Ishikawa, Tsukasa Toyooka, Tsuyoshi Nakamura | 1997-10-07 |
| 5632190 | Burglarproof device for hydraulic machine | Kazuhiro Sunamura, Osamu Tomikawa, Shigehiro Yoshinaga | 1997-05-27 |
| 5575148 | Hydraulic pump control system | Genroku Sugiyama, Hiroshi Watanabe, Shigehiro Yoshinaga | 1996-11-19 |
| 5497805 | Drive control system for hydraulic machine | Kazuhiro Sunamura, Hidefumi Takegahara | 1996-03-12 |
| 5479778 | Hydraulic control system for construction machines | Tsukasa Toyooka, Genroku Sugiyama, Akira Tatsumi | 1996-01-02 |
| 5471839 | Valve apparatus and hydraulic drive system | Genroku Sugiyama | 1995-12-05 |
| 5446979 | Hydraulic circuit system for civil engineering and construction machines | Genroku Sugiyama | 1995-09-05 |
| 5447027 | Hydraulic drive system for hydraulic working machines | Koji Ishikawa, Genroku Sugiyama | 1995-09-05 |