Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5305569 | Thick shingle | Matti Kiik | 1994-04-26 |
| 5232530 | Method of making a thick shingle | Matti Kiik | 1993-08-03 |
| 4559267 | Stick-down system for roofing | John G. Freshwater | 1985-12-17 |