Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4260867 | Electrode drive and nozzle system for automatic air-carbon arc cutting and gouging torch | William J. Coughlin, Stephen A. Hoffman | 1981-04-07 |
| 4218605 | Air-carbon arc cutting and gouging torch | Stephen A. Hoffman | 1980-08-19 |