Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6107602 | Switchable power supply with electronically controlled output curve and adaptive hot start | Todd Gerald Batzler | 2000-08-22 |
| 6087628 | Method and apparatus for controlling a welding power supply | Stephen Paul Ferkel | 2000-07-11 |
| 6043471 | Multiple head inductive heating system | Donald H. Wiseman | 2000-03-28 |
| 5991180 | Auxiliary open circuit voltage power supply | Bernard J. Vogel | 1999-11-23 |
| 5824990 | Power selection and protection circuit for inverter power supply | Michael D. Madsen | 1998-10-20 |
| 5783799 | Series resonant converter, and method and apparatus for control thereof | — | 1998-07-21 |
| 5714731 | Welding power supply arc starter | James F. Ulrich, Michael D. Madsen, Todd Gerald Batzler | 1998-02-03 |
| 5504309 | Induction heater having feedback control responsive to heat output | — | 1996-04-02 |
| 5343023 | Induction heater having a power inverter and a variable frequency output inverter | — | 1994-08-30 |