Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7204063 | Roofing shingle with headlap seal and improved coverage | — | 2007-04-17 |
| 4848057 | Roofing shingles | Peter G. MacDonald, Giuseppe Spinelli | 1989-07-18 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7204063 | Roofing shingle with headlap seal and improved coverage | — | 2007-04-17 |
| 4848057 | Roofing shingles | Peter G. MacDonald, Giuseppe Spinelli | 1989-07-18 |