Issued Patents 2021
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11066603 | Fire insulation material | Brian James | 2021-07-20 |
| 11060754 | Ventilation system for manhole vault | Glen J. Bertini, Donald R. Songras, James Steele | 2021-07-13 |
| 10962253 | Systems for circulating air inside a manhole vault | Glen J. Bertini, Donald R. Songras, James Steele | 2021-03-30 |