Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5347780 | Gypsum fiberboard door frame | Hubert C. Francis, George F. Fowler | 1994-09-20 |
| 5305577 | Fire-resistant structure containing gypsum fiberboard | Hubert C. Francis, George F. Fowler | 1994-04-26 |