Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5090173 | Lapped hardboard panels and method | William G. Coggan, John M. Guyette | 1992-02-25 |
| 4969302 | Siding panels | William G. Coggan, Bertram C. Culpepper, Jr., Michael J. Sommer, Richard C. Wilson | 1990-11-13 |