Issued Patents All Time
Showing 76–94 of 94 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5161373 | Hydraulic control valve system | Rindo Morikawa, Yusuke Kajita | 1992-11-10 |
| 5152140 | Pressure compensating valve spool positioned by difference in pressure receiving areas for load and inlet pressures | Toichi Hirata, Hideaki Tanaka, Yusuke Kajita, Kazunori Nakamura | 1992-10-06 |
| 5152143 | Hydraulic drive system | Yusuke Kajita, Toichi Hirata | 1992-10-06 |
| 5150574 | Hydraulic drive system for civil engineering and construction machine | Toichi Hirata, Hideaki Tanaka, Yusuke Kajita | 1992-09-29 |
| 5146747 | Valve apparatus and hydraulic circuit system | Toichi Hirata | 1992-09-15 |
| 5140815 | Valve apparatus | Toichi Hirata, Hideaki Tanaka, Kazumasa Yuasa, Yusaku Nozawa | 1992-08-25 |
| 5134853 | Hydraulic drive system for construction machines | Toichi Hirata, Yusuke Kajita | 1992-08-04 |
| 5101629 | Hydraulic circuit system for working machine | Toichi Hirata | 1992-04-07 |
| 5083430 | Hydraulic driving apparatus | Toichi Hirata, Hideaki Tanaka, Yusaku Nozawa | 1992-01-28 |
| 5074194 | Hydraulic driving method of and hydraulic driving apparatus for hydraulic machine | Toichi Hirata, Kuniaki Yoshida, Hideaki Tanaka, Masakazu Haga | 1991-12-24 |
| 5062350 | Hydraulic drive system for civil engineering and construction machine | Hideaki Tanaka, Toichi Hirata, Masakazu Haga, Yusuke Kajita | 1991-11-05 |
| 5056312 | Hydraulic drive system for construction machines | Toichi Hirata, Yusuke Kajita, Yukio Aoyagi, Tomohiko Yasudi, Gen Yasuda +5 more | 1991-10-15 |
| 5005358 | Hydraulic drive system for crawler-mounted construction vehicle | Toichi Hirata, Hideaki Tanaka, Yusuke Kajita | 1991-04-09 |
| 4875337 | Construction machine dual-dump hydraulic circuit with piloted arm-boom cylinder supply priority switching valves | Toichi Hirata, Shinichi Satoh | 1989-10-24 |
| 4858649 | Valve apparatus | Shinichi Satoh, Toichi Hirata, Hideaki Tanaka | 1989-08-22 |
| 4832082 | Hydraulic pilot operated directional control valve | Toichi Hirata, Hideaki Tanaka, Shinichi Satoh | 1989-05-23 |
| 4753158 | Pilot hydraulic system for operating directional control valve | Toichi Hirata, Shinichi Satoh | 1988-06-28 |
| 4729222 | Brake circuit apparatus for hydraulic motor | Hideaki Tanaka, Toichi Hirata, Kuniaki Yoshida, Shinichi Mihara | 1988-03-08 |
| 4697418 | Control system for hydraulically-operated construction machinery | Nobuya Okabe, Toichi Hirata, Kuniaki Yoshida, Masakazu Haga, Hideaki Tanaka +1 more | 1987-10-06 |