Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7059586 | Knife gate valve having elastomeric gate and chest seals | Christopher Vanderberg, Shaine Reeves, John Paul Comstock | 2006-06-13 |
| 5154397 | Peripheral knife gate seal | David L. Thomas, David L. Flippo, Samuel A. Bryan | 1992-10-13 |