Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5172716 | Recirculation valve | — | 1992-12-22 |
| 4226428 | Flexible seal and groove assembly | — | 1980-10-07 |
| 4201365 | Lined gate valve having improved seat | Collin C. Hall, Benjamin B. Bullwinkle | 1980-05-06 |