Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4537564 | Pumping system for oil production | Isao Yamato | 1985-08-27 |
| 4451212 | Pumping system for oil production | Isao Yamato | 1984-05-29 |
| 4287790 | High-speed bevel gear transmission system | Minoru Fujiwara, Tstsuji Tamura | 1981-09-08 |