Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11167156 | Smoke ventilation | David J. Royle | 2021-11-09 |
| 10265552 | Smoke ventilation | David J. Royle | 2019-04-23 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11167156 | Smoke ventilation | David J. Royle | 2021-11-09 |
| 10265552 | Smoke ventilation | David J. Royle | 2019-04-23 |