Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6044604 | Composite roofing members having improved dimensional stability and related methods | John B. Letts | 2000-04-04 |
| 5735092 | Composite roofing members having improved dimensional stability and related methods | John B. Letts | 1998-04-07 |