Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4902866 | Apparatus for mixing gases for use in arc welding processes | — | 1990-02-20 |
| 4749841 | Pulsed arc welding method, apparatus and shielding gas composition | Donald P. Viri, Michael D. Viri | 1988-06-07 |