Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |