Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10054238 | Bidirectional knife gate valve with a perimeter seat | Sidney Watterodt | 2018-08-21 |
| 9140397 | Valve wear ring and gate valve with wear ring | Sidney Watterodt | 2015-09-22 |
| 9121514 | Wear ring retainer for a gate valve | Sidney Watterodt | 2015-09-01 |
| 7458559 | Bi-directional knife gate valve apparatus and method | — | 2008-12-02 |
| 6273125 | Compression key lockout device for a gate valve | Keith V. Warzecka | 2001-08-14 |
| 5836570 | Gate valve seat | David L. Thomas, Richard Reugemer | 1998-11-17 |