Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5985397 | Coated synthetic resin board tiles | Alvin E. Witt, Matthew F. Humphreys | 1999-11-16 |
| 5976689 | Coated synthetic resin board tiles | Alvin E. Witt, Matthew F. Humphreys | 1999-11-02 |
| 5437934 | Coated cement board tiles | Alvin E. Witt, Matthew F. Humphreys | 1995-08-01 |