Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4336069 | High strength aggregate for concrete | Lawrence R. Roberts | 1982-06-22 |
| 4318744 | Strength enhancing admixture for concrete compositions | — | 1982-03-09 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4336069 | High strength aggregate for concrete | Lawrence R. Roberts | 1982-06-22 |
| 4318744 | Strength enhancing admixture for concrete compositions | — | 1982-03-09 |