Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4411407 | Ball valve assembly | Kazuhiko Tsuno | 1983-10-25 |
| 4286622 | Check valve assembly | Kazuhiko Tsuno | 1981-09-01 |
| 4266754 | Butterfly valve assembly | Hirotoshi Ogawa, Tomoyuki Ueda, Masataka Machida | 1981-05-12 |