Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8585156 | Travel control device for work vehicle and work vehicle | Tsutomu Udagawa, Eiji Egawa, Makoto Sugaya, Hideo Sorata, Tsuyoshi Nakamura +3 more | 2013-11-19 |
| 8146691 | Travel drive system for work vehicle, work vehicle, and travel drive method | Tsutomu Udagawa, Akira Nakayama, Makoto Sugaya | 2012-04-03 |
| 7712565 | HST travel system for working machine | Tsutomu Udagawa, Eiji Egawa, Akira Nakayama, Kazuo Takiguchi, Makoto Sugaya +1 more | 2010-05-11 |
| 7487609 | Hydraulic circuit device of hydraulic working machine | Tsuyoshi Nakamura, Koji Ishikawa, Masao Nishimura | 2009-02-10 |
| 7272928 | Hydraulic circuit of construction machinery | Nobuei Ariga, Genroku Sugiyama, Hideaki Tanaka, Masaki Egashira, Takatoshi Ooki | 2007-09-25 |
| 7127887 | Oil pressure circuit for working machines | Tsuyoshi Nakamura, Genroku Sugiyama, Kouji Ishikawa | 2006-10-31 |
| 7114591 | Steering system for working truck | Makoto Sugaya, Makoto Matsushita, Kensuke Satou, Yuuji Nagashima | 2006-10-03 |
| 7076947 | Hydraulic circuit of construction machinery | Nobuei Ariga, Genroku Sugiyama, Hideaki Tanaka, Masaki Egashira, Takatoshi Ooki | 2006-07-18 |
| 6691510 | Pipe breakage control valve device | Masao Kariya, Genroku Sugiyama | 2004-02-17 |
| 6619037 | Hydraulic driving device of civil engineering and construction machinery | Toichi Hirata, Genroku Sugiyama, Kouji Ishikawa, Masao Nishimura, Tsuyoshi Nakamura | 2003-09-16 |
| 6241212 | Hose rupture control valve unit | Tarou Takahashi, Genroku Sugiyama | 2001-06-05 |
| 6220028 | Hydraulic drive system for hydraulic work vehicle | Kouji Ishikawa, Toichi Hirata, Genroku Sugiyama, Tsuyoshi Nakamura, Yasuharu Gotou | 2001-04-24 |
| 6212886 | Hydraulic drive system and directional control valve apparatus in hydraulic machine | Genroku Sugiyama, Toichi Hirata | 2001-04-10 |
| 6161586 | Tournament oil path constituting apparatus | Toichi Hirata, Genroku Sugiyama, 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, Toichi Hirata, Hidefumi Takegahara, Kouji Ishikawa, Genroku Sugiyama +1 more | 2000-08-08 |
| 5974796 | Hydraulic circuit system for hydraulic working machine | Kouji Ishikawa, Genroku Sugiyama, Tsuyoshi Nakamura | 1999-11-02 |
| 5940997 | Hydraulic circuit system for hydraulic working machine | Toichi Hirata, Genroku Sugiyama, Kazunori Nakamura, Kouji Ishikawa, Tsuyoshi Nakamura | 1999-08-24 |
| 5930996 | Auto-acceleration system for prime mover of hydraulic construction machine and control system for prime mover and hydraulic pump | Kazunori Nakamura, Ei Takahashi, Kouji Ishikawa, Tsuyoshi Nakamura, Yoichi Kowatari +3 more | 1999-08-03 |
| 5911506 | Control system for prime mover and hydraulic pump of hydraulic construction machine | Kazunori Nakamura, Ei Takahashi, Kouji Ishikawa, Tsuyoshi Nakamura, Yoichi Kowatari +3 more | 1999-06-15 |
| 5907951 | Hydraulic control system for construction machine | Toichi Hirata, Genroku Sugiyama, Kouji Ishikawa, Tsuyoshi Nakamura | 1999-06-01 |
| 5890303 | Hydraulic by-pass circuit for a hydraulic shovel | Kouji Ishikawa, Toichi Hirata, Genroku Sugiyama, Youichi Kowatari | 1999-04-06 |
| 5848531 | Hydraulic drive system for construction machines | Tsuyoshi Nakamura, Toichi Hirata, Genroku Sugiyama, Youichi Kowatari, Kouji Ishikawa | 1998-12-15 |
| 5829252 | Hydraulic system having tandem hydraulic function | Toichi Hirata, Genroku Sugiyama | 1998-11-03 |
| 5813311 | Hydraulic control system for hydraulic working machine | Toichi Hirata, Genroku Sugiyama, Shigehiro Yoshinaga, Kouji Ishikawa, Youichi Kowatari +1 more | 1998-09-29 |
| 5673558 | Hydraulic circuit system for hydraulic excavator | Genroku Sugiyama, Toichi Hirata, Koji Ishikawa, Tsuyoshi Nakamura | 1997-10-07 |