Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4658978 | Top entry ball valve and a clamp therefor | Tohru Wada, Tohru Nakanishi, Nobuo Ishigami | 1987-04-21 |
| 4641681 | Clamp for use with top entry ball valve | Hiromichi Hiranuma | 1987-02-10 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4658978 | Top entry ball valve and a clamp therefor | Tohru Wada, Tohru Nakanishi, Nobuo Ishigami | 1987-04-21 |
| 4641681 | Clamp for use with top entry ball valve | Hiromichi Hiranuma | 1987-02-10 |