Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4711262 | Uni-directional/bi-directional gate valve | Don B. Wafer | 1987-12-08 |
| 4510960 | Valve stem-to-bonnet backseat | Charles E. Jennings, Lien-Yan Chen, Bob C. Hopkins, John N. McIntyre, Alfred P. Regitz | 1985-04-16 |
| 4311297 | Pressure insensitive valve | — | 1982-01-19 |