Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5979874 | Split knife gate valve having a uniformly compressed and constrained resilient gate seat and method for producing the same | David L. Gambetta | 1999-11-09 |
| 5653423 | Knife gate valve with mechanically retained gate seat | Calvin Young, David L. Gambetta, Jon A. Hansen, Nolan D. King, Richard A. Sutherland | 1997-08-05 |