Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6360511 | Methods of re-coating and re-covering bitumen-based built-up roofing membranes | Kenneth Brzozowski | 2002-03-26 |
| 6127292 | Coal tar impregnated reinforcement sheets | Kenneth Brzozowski | 2000-10-03 |
| 6110846 | Built-up roofing systems and methods | Kenneth Brzozowski | 2000-08-29 |
| 5969013 | Coal tar compositions | Kenneth Brzozowski | 1999-10-19 |