Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4954683 | Plasma arc gouger | — | 1990-09-04 |
| 4748312 | Plasma-arc torch with gas cooled blow-out electrode | Richard A. Spaulding | 1988-05-31 |
| 4701590 | Spring loaded electrode exposure interlock device | — | 1987-10-20 |
| 4691094 | Plasma-arc torch with sliding gas valve interlock | Richard A. Spaulding | 1987-09-01 |
| 4663515 | Plasma-arc torch interlock with flow sensing | Robert D. Kneeland, Richard A. Spaulding | 1987-05-05 |
| 4663512 | Plasma-arc torch interlock with pressure sensing | Robert D. Kneeland, Richard A. Spaulding | 1987-05-05 |
| 4585921 | Torch operation interlock device | Raymond G. Wilkins | 1986-04-29 |
| 4581516 | Plasma torch with a common gas source for the plasma and for the secondary gas flows | Richard A. Spaulding | 1986-04-08 |
| 4558201 | Plasma-arc torch with gas cooled blow-out electrode | — | 1985-12-10 |