Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5666808 | Operating valve assembly with pressure compensation valve | Koji Yamashita, Teruo Akiyama, Kouji Saito | 1997-09-16 |
| 5535663 | Operating valve assembly with pressure compensation valve | Koji Yamashita, Teruo Akiyama, Kouji Saito | 1996-07-16 |
| 5273069 | Operation valve with pressure compensation valve | Teruo Akiyama, Kiyoshi Shirai, Naoki Ishizaki, Koji Yamashita | 1993-12-28 |
| 5271227 | Hydraulic apparatus with pressure compensating valves | Teruo Akiyama, Kiyoshi Shirai, Naoki Ishizaki, Koji Yamashita | 1993-12-21 |