Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7319206 | Method and apparatus for receiving a universal input voltage in a welding power source | — | 2008-01-15 |
| 7049546 | Method and apparatus for receiving a universal input voltage in a welding power source | — | 2006-05-23 |
| 6849827 | Method and apparatus for receiving a universal input voltage in a welding power source | — | 2005-02-01 |
| 6239407 | Method and apparatus for receiving a universal input voltage in a welding power source | — | 2001-05-29 |
| 6160722 | Uninterruptible power supplies with dual-sourcing capability and methods of operation thereof | Robert W. Johnson, William J. Raddi | 2000-12-12 |
| 6002103 | Method and apparatus for receiving a universal input voltage in a welding power source | — | 1999-12-14 |
| 5601741 | Method and apparatus for receiving a universal input voltage in a welding power source | — | 1997-02-11 |
| 5086205 | Apparatus employing a welding power supply for powering a plasma cutting torch | — | 1992-02-04 |
| 4943699 | System for supplying power | — | 1990-07-24 |
| 4918285 | System for supplying power | — | 1990-04-17 |
| 4839499 | System for supplying power to different cutting torches | Mariusz B. Kotecki | 1989-06-13 |
| 4385223 | Circuit for use with arc voltage controllers in AC gas tungsten arc welding | — | 1983-05-24 |