Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9550249 | High power factor rectifier/filter for three phase input welder or plasma cutter | Stephen W. Norris | 2017-01-24 |
| 6794601 | Plasma arc torch system with pilot re-attach circuit and method | Stephen W. Norris, David Morrie | 2004-09-21 |