Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4674245 | Roof walkway panel | — | 1987-06-23 |
| 4505449 | Lightweight concrete cladded heavy equipment base | Donald B. Mitchell | 1985-03-19 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4674245 | Roof walkway panel | — | 1987-06-23 |
| 4505449 | Lightweight concrete cladded heavy equipment base | Donald B. Mitchell | 1985-03-19 |