Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4997484 | Hydraulic cement and composition employing the same | Billy B. Gravitt, James Sawyer | 1991-03-05 |
| 4842649 | Cement composition curable at low temperatures | Billy B. Gravitt, James Sawyer | 1989-06-27 |
| 4642137 | Mineral binder and compositions employing the same | Mark Fitzgerald, James Sawyer | 1987-02-10 |