Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4716267 | Three phase high frequency spike welding system | — | 1987-12-29 |
| 4560852 | Spike welding system having improved power supply | — | 1985-12-24 |
| 4458132 | Welding apparatus and control system therefor | Thomas S. Holtaway | 1984-07-03 |