Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4943904 | D.C. power unit assembly including unitized single-phase D.C. power units | Mark B. Siehling | 1990-07-24 |
| 4682000 | Welding transformer and rectifier assembly | Gary Edward Holt, Mark B. Siehling | 1987-07-21 |