Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888058 | Silica fume slurry | Arnold M. Rosenberg, James M. Gaidis | 1989-12-19 |
| 4829107 | Rice hull ash concrete admixture | Ellis Gartner | 1989-05-09 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888058 | Silica fume slurry | Arnold M. Rosenberg, James M. Gaidis | 1989-12-19 |
| 4829107 | Rice hull ash concrete admixture | Ellis Gartner | 1989-05-09 |