Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7525067 | Dual wire welding torch and method | Fernando Martinez Diez, Kevin Stump, Howard W. Ludewig, Matthew M. Robinson, Keith Egland | 2009-04-28 |
| 6184491 | Method and apparatus for monitoring weld quality | Bryan Crane, Howard W. Ludewig, Brett A. Jones | 2001-02-06 |
| 5911893 | Arc welding method and apparatus with power cable fatigue monitor | Richard A. Stear | 1999-06-15 |
| 5750957 | Method for arc welding fault detection | Howard W. Ludewig, Brian L. Wallace | 1998-05-12 |
| 5521354 | Method for arc welding fault detection | Howard W. Ludewig, James H. Siwicke, Brian L. Wallace, Stephen A. Haytcher, Dean E. Rees | 1996-05-28 |
| 4337386 | Welder control | — | 1982-06-29 |