Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE37608 | Plasma torch electronic pulsing circuit | David A. Tatham | 2002-03-26 |
| 5189277 | Modular, stackable plasma cutting apparatus | John Boisvert, Fred Rogers, David A. Tatham, Raymond G. Wilkins | 1993-02-23 |
| 5170030 | Plasma torch electronic pulsing circuit | David A. Tatham | 1992-12-08 |
| 4935864 | Localized cooling apparatus for cooling integrated circuit devices | William L. Schmidt, Richard E. Olson | 1990-06-19 |