Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4396820 | Method of making a filled electrode for arc welding | — | 1983-08-02 |
| 4379811 | Tubular filler wire for fusion welding | Herbert Gerdau | 1983-04-12 |
| 4305197 | Tubular filler wire for fusion welding | Herbert Gerdau | 1981-12-15 |