Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4914268 | Beam welding process | Charles E. Hixon | 1990-04-03 |
| 4857696 | Laser/EDM drilling manufacturing cell | David R. Taeusch | 1989-08-15 |
| 4686348 | Method for hardfacing valves | Kent I. Johns | 1987-08-11 |
| 4529169 | Hardfaced valves and method of making same | Kent I. Johns | 1985-07-16 |
| 4438598 | Surface temperature control apparatus | — | 1984-03-27 |