Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4333279 | Three-tab shingle with staggered butt edge feature | Raymond L. R. Corbin | 1982-06-08 |
| 4274243 | Asphalt shingle for simulating a tiled roof | Raymond L. R. Corbin | 1981-06-23 |