Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6137823 | Bi-metal panel for electric arc furnace | Eric N. Johnson, Roger Johnson | 2000-10-24 |
| 5740196 | End caps and elbows for cooling coils for an electric arc furnance | Eric N. Johnson, Roger Johnson | 1998-04-14 |
| 5266246 | Method of forming a molded plastic part | Charles SNOOKS, SR. | 1993-11-30 |
| 5197080 | End cap for cooling coils for an arc furnace | Eric N. Johnson, Roger Johnson | 1993-03-23 |