Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4423301 | Air-carbon arc cutting and gouging | Perry J. Rieppel | 1983-12-27 |
| 4258244 | Method for reducing operating noise of the air-carbon arc cutting and gouging process | Perry J. Rieppel | 1981-03-24 |
| 4201902 | Electrode for air-carbon arc cutting and gouging | Perry J. Rieppel | 1980-05-06 |