Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6608857 | Method of controlling the output voltage of a furnace | Albrecht Wolf | 2003-08-19 |
| 6226313 | Power source circuit and its control for three-phase electric arc furnace to reduce flicker | Albrecht Wolf | 2001-05-01 |
| 6087629 | Control system for an arc welding machine | Hans-Peter Beck | 2000-07-11 |