Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4533644 | Mortar | — | 1985-08-06 |
| 4507395 | Chromia-magnesia ramming cement | — | 1985-03-26 |
| 4476234 | Refractory cement | Malcolm E. Washburn, Louis J. Trostel, Jr. | 1984-10-09 |
| 4424281 | Refractory cement | — | 1984-01-03 |