Issued Patents 2020
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 10823313 | Smoke and sound barrier for a building penetration | John C. Hulteen, George W. Frost, Richard J. Haffner | 2020-11-03 | $55,691,000 |
| 10662644 | Penetration firestop system | John C. Hulteen, George W. Frost, Richard J. Haffner | 2020-05-26 | $33,730,000 |
| 10597867 | Smoke and sound barrier for a building joint system | John C. Hulteen, George W. Frost, Richard J. Haffner | 2020-03-24 | $44,186,000 |