Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883253 | Ball valve and methods of fabrication | Mitsuharu Hashimoto | 1989-11-28 |
| 4869450 | Ball valve | Mitsuharu Hashimoto | 1989-09-26 |
| 4813649 | Ball valve | Mitsuharu Hashimoto | 1989-03-21 |