Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5674929 | Cementitious compositions for layered applications | — | 1997-10-07 |
| 5609681 | Workable cementitious compositions | Josef F. Drs, Odd M. Tjugum, Salvatore Valenti | 1997-03-11 |