Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6572948 | Fire stop device with rupturable element | — | 2003-06-03 |
| 6536169 | Adjustable rack for supporting firestop material in a through-penetration | — | 2003-03-25 |
| 6521834 | Fire stopping cover plate for fire stopping electrical outlets and switches | Robert J. Boros, D. Max Harshbarger | 2003-02-18 |